diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,7 +69,7 @@
 
 add_definitions("-DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII")
 add_definitions(-DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT)
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050a00)
 add_definitions(-DQT_NO_URL_CAST_FROM_STRING)
 add_definitions(-DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS)
 ########### CMake Config Files ###########
diff --git a/src/ksieveui/editor/sievetextedit.cpp b/src/ksieveui/editor/sievetextedit.cpp
--- a/src/ksieveui/editor/sievetextedit.cpp
+++ b/src/ksieveui/editor/sievetextedit.cpp
@@ -122,7 +122,7 @@
         ++digits;
     }
 
-    const int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
+    const int space = 2 + fontMetrics().boundingRect(QLatin1Char('9')).width() * digits;
     return space;
 }
 
diff --git a/src/ksieveui/editor/webengine/findbar/findbarbase.cpp b/src/ksieveui/editor/webengine/findbar/findbarbase.cpp
--- a/src/ksieveui/editor/webengine/findbar/findbarbase.cpp
+++ b/src/ksieveui/editor/webengine/findbar/findbarbase.cpp
@@ -98,7 +98,7 @@
     mStatus->setTextFormat(Qt::PlainText);
     QFontMetrics fm(mStatus->font());
     mNotFoundString = i18n("Phrase not found");
-    mStatus->setFixedWidth(fm.width(mNotFoundString));
+    mStatus->setFixedWidth(fm.boundingRect(mNotFoundString).width());
     lay->addWidget(mStatus);
 
     setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed));