diff --git a/autotests/folding/usr.bin.apparmor-profile-test.fold b/autotests/folding/usr.bin.apparmor-profile-test.fold
--- a/autotests/folding/usr.bin.apparmor-profile-test.fold
+++ b/autotests/folding/usr.bin.apparmor-profile-test.fold
@@ -57,7 +57,7 @@
 	/usr/bin/*           Pixr<endfold id='1'>,</endfold id='1'>
 	/usr/bin/khelpcenter Cx  -> sanitized_helper<endfold id='1'>,</endfold id='1'>
 	/usr/bin/helloworld  cxr ->
-			hello_world<endfold id='1'>,</endfold id='1'>
+		hello_world<endfold id='1'>,</endfold id='1'>
 
 	# Dbus rules
 	<beginfold id='1'>dbus</beginfold id='1'> (send)  #No-Comment
@@ -93,7 +93,6 @@
 		# Link rules (two ways)
 		l /foo1 -> /bar<endfold id='1'>,</endfold id='1'>
 		<beginfold id='1'>link</beginfold id='1'> /foo2 -> bar<endfold id='1'>,</endfold id='1'>
-		<beginfold id='1'>link</beginfold id='1'> /foo3 to bar<endfold id='1'>,</endfold id='1'>
 		<beginfold id='1'>link</beginfold id='1'> subset /link* -> /**<endfold id='1'>,</endfold id='1'>
 
 		# Network rules
@@ -131,6 +130,7 @@
 		set <beginfold id='1'>rlimit</beginfold id='1'> nproc <= 10<endfold id='1'>,</endfold id='1'>
 		set <beginfold id='1'>rlimit</beginfold id='1'> memlock <= 2GB<endfold id='1'>,</endfold id='1'>
 		set <beginfold id='1'>rlimit</beginfold id='1'> rss <= infinity<endfold id='1'>,</endfold id='1'>
+		set <beginfold id='1'>rlimit</beginfold id='1'> nice <= -12<endfold id='1'>,</endfold id='1'>
 
 		# Change Profile rules
 		<beginfold id='1'>change_profile</beginfold id='1'> unsafe /** -> [^u/]**<endfold id='1'>,</endfold id='1'>
diff --git a/autotests/html/usr.bin.apparmor-profile-test.html b/autotests/html/usr.bin.apparmor-profile-test.html
--- a/autotests/html/usr.bin.apparmor-profile-test.html
+++ b/autotests/html/usr.bin.apparmor-profile-test.html
@@ -63,7 +63,7 @@
 	/usr/bin/<span style="color:#3daee9;">*</span>          <span style="font-weight:bold;"> Pixr</span>,
 	/usr/bin/khelpcenter<span style="font-weight:bold;"> Cx</span>  <span style="color:#bf0303;font-weight:bold;">-&gt;</span> <span style="color:#644a9b;font-style:italic;">sanitized_helper</span>,
 	/usr/bin/helloworld <span style="font-weight:bold;"> cxr</span> <span style="color:#bf0303;font-weight:bold;">-&gt;</span>
-			<span style="color:#644a9b;font-style:italic;">hello_world</span>,
+		<span style="color:#644a9b;font-style:italic;">hello_world</span>,
 
 	<span style="color:#898887;"># Dbus rules</span>
 	<span style="color:#0057ae;font-weight:bold;">dbus</span> (<span style="font-weight:bold;">send</span>)  <span style="color:#bf0303;text-decoration:underline;">#</span>No-Comment
@@ -99,7 +99,6 @@
 		<span style="color:#898887;"># Link rules (two ways)</span>
 	<span style="font-weight:bold;">	l</span> /foo1 <span style="color:#bf0303;font-weight:bold;">-&gt;</span> /bar,
 		<span style="color:#0057ae;font-weight:bold;">link</span> /foo2 <span style="color:#bf0303;font-weight:bold;">-&gt;</span> bar,
-		<span style="color:#0057ae;font-weight:bold;">link</span> /foo3 <span style="color:#bf0303;font-weight:bold;">to</span> bar,
 		<span style="color:#0057ae;font-weight:bold;">link</span> <span style="color:#0057ae;">subset</span> /link<span style="color:#3daee9;">*</span> <span style="color:#bf0303;font-weight:bold;">-&gt;</span> /<span style="color:#3daee9;">**</span>,
 
 		<span style="color:#898887;"># Network rules</span>
@@ -137,6 +136,7 @@
 		<span style="color:#0057ae;font-weight:bold;">set</span> <span style="color:#0057ae;font-weight:bold;">rlimit</span> <span style="color:#0057ae;">nproc</span> <span style="color:#bf0303;font-weight:bold;">&lt;=</span> <span style="color:#b08000;">10</span>,
 		<span style="color:#0057ae;font-weight:bold;">set</span> <span style="color:#0057ae;font-weight:bold;">rlimit</span> <span style="color:#0057ae;">memlock</span> <span style="color:#bf0303;font-weight:bold;">&lt;=</span> <span style="color:#b08000;">2</span><span style="color:#b08000;font-weight:bold;">GB</span>,
 		<span style="color:#0057ae;font-weight:bold;">set</span> <span style="color:#0057ae;font-weight:bold;">rlimit</span> <span style="color:#0057ae;">rss</span> <span style="color:#bf0303;font-weight:bold;">&lt;=</span> <span style="color:#b08000;">infinity</span>,
+		<span style="color:#0057ae;font-weight:bold;">set</span> <span style="color:#0057ae;font-weight:bold;">rlimit</span> <span style="color:#0057ae;">nice</span> <span style="color:#bf0303;font-weight:bold;">&lt;=</span> <span style="color:#b08000;">-12</span>,
 
 		<span style="color:#898887;"># Change Profile rules</span>
 		<span style="color:#0057ae;font-weight:bold;">change_profile</span> <span style="color:#0057ae;">unsafe</span> /<span style="color:#3daee9;">**</span> <span style="color:#bf0303;font-weight:bold;">-&gt;</span> <span style="color:#644a9b;font-style:italic;">[^u/]</span><span style="color:#3daee9;font-style:italic;">**</span>,
diff --git a/autotests/input/usr.bin.apparmor-profile-test b/autotests/input/usr.bin.apparmor-profile-test
--- a/autotests/input/usr.bin.apparmor-profile-test
+++ b/autotests/input/usr.bin.apparmor-profile-test
@@ -57,7 +57,7 @@
 	/usr/bin/*           Pixr,
 	/usr/bin/khelpcenter Cx  -> sanitized_helper,
 	/usr/bin/helloworld  cxr ->
-			hello_world,
+		hello_world,
 
 	# Dbus rules
 	dbus (send)  #No-Comment
@@ -93,7 +93,6 @@
 		# Link rules (two ways)
 		l /foo1 -> /bar,
 		link /foo2 -> bar,
-		link /foo3 to bar,
 		link subset /link* -> /**,
 
 		# Network rules
@@ -131,6 +130,7 @@
 		set rlimit nproc <= 10,
 		set rlimit memlock <= 2GB,
 		set rlimit rss <= infinity,
+		set rlimit nice <= -12,
 
 		# Change Profile rules
 		change_profile unsafe /** -> [^u/]**,
diff --git a/autotests/reference/usr.bin.apparmor-profile-test.ref b/autotests/reference/usr.bin.apparmor-profile-test.ref
--- a/autotests/reference/usr.bin.apparmor-profile-test.ref
+++ b/autotests/reference/usr.bin.apparmor-profile-test.ref
@@ -57,7 +57,7 @@
 <Normal Text>	</Normal Text><Path>/usr/bin/</Path><Globbing Char>*</Globbing Char><Normal Text>          </Normal Text><Permissions> Pixr</Permissions><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>	</Normal Text><Path>/usr/bin/khelpcenter</Path><Permissions> Cx</Permissions><Normal Text>  </Normal Text><Operator 2>-></Operator 2><Normal Text> </Normal Text><Transition Profile Name>sanitized_helper</Transition Profile Name><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>	</Normal Text><Path>/usr/bin/helloworld</Path><Normal Text> </Normal Text><Permissions> cxr</Permissions><Normal Text> </Normal Text><Operator 2>-></Operator 2><br/>
-<Normal Text>			</Normal Text><Transition Profile Name>hello_world</Transition Profile Name><End of Rule Char>,</End of Rule Char><br/>
+<Normal Text>		</Normal Text><Transition Profile Name>hello_world</Transition Profile Name><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text></Normal Text><br/>
 <Normal Text>	</Normal Text><Comment># Dbus rules</Comment><br/>
 <Normal Text>	</Normal Text><Rule>dbus</Rule><Normal Text> (</Normal Text><Permissions>send</Permissions><Normal Text>)  </Normal Text><Error>#</Error><Normal Text>No-Comment</Normal Text><br/>
@@ -93,7 +93,6 @@
 <Normal Text>		</Normal Text><Comment># Link rules (two ways)</Comment><br/>
 <Normal Text>	</Normal Text><Permissions>	l</Permissions><Normal Text> </Normal Text><Path>/foo1</Path><Normal Text> </Normal Text><Operator 2>-></Operator 2><Normal Text> </Normal Text><Path>/bar</Path><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>		</Normal Text><Rule>link</Rule><Normal Text> </Normal Text><Path>/foo2</Path><Normal Text> </Normal Text><Operator 2>-></Operator 2><Normal Text> bar</Normal Text><End of Rule Char>,</End of Rule Char><br/>
-<Normal Text>		</Normal Text><Rule>link</Rule><Normal Text> </Normal Text><Path>/foo3</Path><Normal Text> </Normal Text><Operator 2>to</Operator 2><Normal Text> bar</Normal Text><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>		</Normal Text><Rule>link</Rule><Normal Text> </Normal Text><Data>subset</Data><Normal Text> </Normal Text><Path>/link</Path><Globbing Char>*</Globbing Char><Normal Text> </Normal Text><Operator 2>-></Operator 2><Normal Text> </Normal Text><Path>/</Path><Globbing Char>**</Globbing Char><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text></Normal Text><br/>
 <Normal Text>		</Normal Text><Comment># Network rules</Comment><br/>
@@ -131,6 +130,7 @@
 <Normal Text>		</Normal Text><Rule>set</Rule><Normal Text> </Normal Text><Rule>rlimit</Rule><Normal Text> </Normal Text><Data>nproc</Data><Normal Text> </Normal Text><Operator 2><=</Operator 2><Normal Text> </Normal Text><Number>10</Number><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>		</Normal Text><Rule>set</Rule><Normal Text> </Normal Text><Rule>rlimit</Rule><Normal Text> </Normal Text><Data>memlock</Data><Normal Text> </Normal Text><Operator 2><=</Operator 2><Normal Text> </Normal Text><Number>2</Number><Numerical Unit>GB</Numerical Unit><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text>		</Normal Text><Rule>set</Rule><Normal Text> </Normal Text><Rule>rlimit</Rule><Normal Text> </Normal Text><Data>rss</Data><Normal Text> </Normal Text><Operator 2><=</Operator 2><Normal Text> </Normal Text><Number>infinity</Number><End of Rule Char>,</End of Rule Char><br/>
+<Normal Text>		</Normal Text><Rule>set</Rule><Normal Text> </Normal Text><Rule>rlimit</Rule><Normal Text> </Normal Text><Data>nice</Data><Normal Text> </Normal Text><Operator 2><=</Operator 2><Normal Text> </Normal Text><Number>-12</Number><End of Rule Char>,</End of Rule Char><br/>
 <Normal Text></Normal Text><br/>
 <Normal Text>		</Normal Text><Comment># Change Profile rules</Comment><br/>
 <Normal Text>		</Normal Text><Rule>change_profile</Rule><Normal Text> </Normal Text><Data>unsafe</Data><Normal Text> </Normal Text><Path>/</Path><Globbing Char>**</Globbing Char><Normal Text> </Normal Text><Operator 2>-></Operator 2><Normal Text> </Normal Text><Transition Profile Name>[^u/]</Transition Profile Name><Globbing Char in Tran. Prof.>**</Globbing Char in Tran. Prof.><End of Rule Char>,</End of Rule Char><br/>
diff --git a/data/syntax/apparmor.xml b/data/syntax/apparmor.xml
--- a/data/syntax/apparmor.xml
+++ b/data/syntax/apparmor.xml
@@ -36,12 +36,16 @@
   ==========================================================================================
 
   Last update:
-    Syntax highlighting based on AppArmor 2.13.2
+    Syntax highlighting based on AppArmor 2.13.3
     For more details about the syntax of AppArmor profiles, visit:
       https://gitlab.com/apparmor/apparmor/wikis/Documentation
-      http://manpages.ubuntu.com/manpages/cosmic/en/man5/apparmor.d.5.html
+      https://manpages.ubuntu.com/manpages/disco/en/man5/apparmor.d.5.html
 
   Change log:
+   * Version 9 [20-Jun-2019]: (AppArmor 2.13.3):
+      - Add new network domain keywords.
+      - Fixes: drop unsupported 'to' operator for link rules and only highlight the 'in'
+        operator in mount rules. Only highlight valid numbers in rlimit rules.
    * Version 8 [02-Apr-2019]: (AppArmor 2.13.2)
       - Do not highlight variable assignments and alias rules within profiles.
       - Add keywords of "tunables/share" variables.
@@ -60,15 +64,15 @@
    * Version 3 [24-Sep-2017, by Nibaldo G.]:
       - Fix incorrect highlighting of the DBus rule 'name' keyword.
    * Version 2 [29-Aug-2017, by Nibaldo G.]:
-      - Improvements in highlighting and bug fixes.
+      - Improvements and bug fixes.
       - Each rule has its own context.
       - The profile name is highlighted in the profile header and profile transition rules.
    * Version 1 [22-Feb-2017, by Nibaldo González]:
       - Initial version. Support for profile syntax of Apparmor 2.11.
 -->
 
 <language name="AppArmor Security Profile"
-          version="8"
+          version="9"
           kateversion="5.0"
           section="Markup"
           extensions="usr.bin.*;usr.sbin.*;bin.*;sbin.*;usr.lib.*;usr.lib64.*;usr.lib32.*;usr.libx32.*;usr.libexec.*;usr.local.bin.*;usr.local.sbin.*;usr.local.lib*;opt.*;etc.cron.*;snap.*;snap-update-ns.*;snap-confine.*"
@@ -109,7 +113,7 @@
 	</list>
 	<list name="file_qualifiers">
 		<item>owner</item>
-		<!-- other -->
+		<item>other</item>
 	</list>
 	<list name="qualifiers">
 		<item>audit</item>
@@ -205,6 +209,8 @@
 		<item>ib</item>
 		<item>kcm</item>
 		<item>smc</item>
+		<item>qipcrtr</item>
+		<item>xdp</item>
 
 		<!-- Type.
 		     Also: packet -->
@@ -1047,13 +1053,15 @@
 			<Detect2Chars context="#stay" attribute="Operator 1" char="+" char1="="/>
 			<Detect2Chars context="#stay" attribute="Operator 2" char="-" char1="&gt;"/>
 		</context>
-		<context name="_operators_keywords" attribute="Normal Text" lineEndContext="#stay">
-			<RegExpr context="#stay" attribute="Operator 2" String="\b(in|to)(?=[\s\(\{\[&quot;/@\$]|$)"/>
+		<context name="_operators_in" attribute="Normal Text" lineEndContext="#stay">
+			<!-- Only in mount rules -->
+			<RegExpr context="#stay" attribute="Operator 2" String="\b(in)(?=[\s\(\{\[&quot;/@\$]|$)"/>
 		</context>
 
 		<!-- RULES -->
 
 		<!-- For all rules -->
+		<!-- Also see: _default_parentheses_block_rule -->
 		<context name="_common_rule" attribute="Normal Text" lineEndContext="#stay">
 			<!-- Highlight as path the text after the '=' operator, except keywords or simple words ([\w\-\+]+) -->
 			<RegExpr context="#stay" attribute="Error" String="\=(?=\s*($|&endPath;))"/>
@@ -1064,7 +1072,6 @@
 			<IncludeRules context="_common"/>
 			<DetectChar context="_r_curly_brackets" attribute="Globbing Brackets" char="{"/>
 			<DetectChar context="_r_square_brackets" attribute="Globbing Brackets" char="["/>
-			<IncludeRules context="_operators_keywords"/>
 			<!-- This must be at the end of each context (to avoid conflicts with some keywords) -->
 			<IncludeRules context="_end_rule"/>
 		</context>
@@ -1114,6 +1121,7 @@
 		<context name="_mount_rule_keywords" attribute="Normal Text" lineEndContext="#stay">
 			<keyword context="#stay" attribute="Permissions" String="rule_mount_flags"/>
 			<keyword context="#stay" attribute="Flags" String="rule_mount_fstypes"/>
+			<IncludeRules context="_operators_in"/>
 		</context>
 
 		<!-- Pivot Root Rule -->
@@ -1205,11 +1213,9 @@
 		<context name="_rule_rlimit" attribute="Normal Text" lineEndContext="#stay">
 			<keyword context="#stay" attribute="Data" String="rule_rlimit"/>
 			<Detect2Chars context="#stay" attribute="Operator 2" char="&lt;" char1="="/>
-			<HlCHex context="_number_unit" attribute="Number"/>
-			<Float context="_number_unit" attribute="Number"/>
-			<Int context="_number_unit" attribute="Number"/>
-			<AnyChar context="#stay" attribute="Number" String="-+"/>
-			<WordDetect context="#stay" attribute="Number" String="infinity"/> <!-- WordDetect uses -+ as delimiter -->
+			<RegExpr context="#stay" attribute="Number" String="\-(20|1?\d)\b"/>
+			<RegExpr context="_number_unit" attribute="Number" String="\b\d+"/> <!-- Rules Int don't use '-' as a delimiter -->
+			<WordDetect context="#stay" attribute="Number" String="infinity"/>
 			<RegExpr context="#stay" attribute="Numerical Unit" String="\b([KMG]B?|[shd]|us|ms|min|sec|(minute|day|hour|week|second)(s?)|(milli|micro)second(s?))\b"/>
 			<IncludeRules context="_default_rule"/>
 		</context>
@@ -1321,9 +1327,9 @@
 			<IncludeRules context="_common_parentheses_block"/>
 			<IncludeRules context="_end_rule_irnc"/>
 		</context>
+		<!-- Parentheses Block within Rules -->
 		<context name="_default_parentheses_block_rule" attribute="Normal Text" lineEndContext="#stay">
 			<IncludeRules context="_common_parentheses_block"/>
-			<IncludeRules context="_operators_keywords"/>
 			<IncludeRules context="_end_rule_irnc_parentheses_rule"/>
 		</context>