diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,9 +10,9 @@
 set (KDE_APPLICATIONS_VERSION_MICRO "70")
 set (KDE_APPLICATIONS_VERSION "${KDE_APPLICATIONS_VERSION_MAJOR}.${KDE_APPLICATIONS_VERSION_MINOR}.${KDE_APPLICATIONS_VERSION_MICRO}")
 
-set(KF5_MIN_VERSION "5.15.0")
+set(KF5_MIN_VERSION "5.49.0")
 
-find_package(ECM 5.15.0 REQUIRED CONFIG)
+find_package(ECM 5.49.0 REQUIRED CONFIG)
 set(CMAKE_MODULE_PATH ${cantor_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
 find_package(Qt5 5.6.0 CONFIG REQUIRED
@@ -35,6 +35,7 @@
     CoreAddons
     Archive
     Parts
+    SyntaxHighlighting
     TextWidgets
     KIO
     XmlGui
diff --git a/src/backends/maxima/CMakeLists.txt b/src/backends/maxima/CMakeLists.txt
--- a/src/backends/maxima/CMakeLists.txt
+++ b/src/backends/maxima/CMakeLists.txt
@@ -18,7 +18,7 @@
 add_backend(maximabackend ${MaximaBackend_SRCS})
 
 if(NOT WIN32)
-  target_link_libraries(cantor_maximabackend KF5::Pty)
+  target_link_libraries(cantor_maximabackend KF5::Pty KF5::SyntaxHighlighting)
 endif(NOT WIN32)
 
 if(BUILD_TESTING)