diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6e2e1d9cb..0d37970c1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -93,10 +93,6 @@ find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS
     Widgets
 )
 
-if (QT_MAJOR_VERSION STREQUAL "6")
-    find_package(Qt6 REQUIRED COMPONENTS Core5Compat)
-endif()
-
 find_package(
     KF${KF_MAJOR_VERSION} ${KF_MIN_VERSION}
     REQUIRED
@@ -138,10 +134,6 @@ target_link_libraries(ghostwriter PRIVATE
     ${CMARK_LIBS}
 )
 
-target_link_libraries(ghostwriter PRIVATE
-    Qt::Core5Compat
-)
-
 set_target_properties(ghostwriter PROPERTIES
     WIN32_EXECUTABLE ON
     MACOSX_BUNDLE ON
diff --git a/src/editor/markdownhighlighter.cpp b/src/editor/markdownhighlighter.cpp
index 245999105..d7d5bc19c 100644
--- a/src/editor/markdownhighlighter.cpp
+++ b/src/editor/markdownhighlighter.cpp
@@ -13,7 +13,6 @@
 #include <QRegularExpression>
 #include <QStaticText>
 #include <QString>
-#include <QStringRef>
 #include <QSyntaxHighlighter>
 #include <QTextCharFormat>
 #include <QTextDocument>
diff --git a/src/markdown/memoryarena.cpp b/src/markdown/memoryarena.cpp
index 8e1db78b1..72b09c171 100644
--- a/src/markdown/memoryarena.cpp
+++ b/src/markdown/memoryarena.cpp
@@ -7,8 +7,6 @@
 #ifndef MEMORY_ARENA_CPP
 #define MEMORY_ARENA_CPP
 
-#include <QLinkedListIterator>
-
 #include "memoryarena.h"
 
 namespace ghostwriter
diff --git a/src/spelling/spellcheckdecorator.cpp b/src/spelling/spellcheckdecorator.cpp
index efdb68843..14792d728 100644
--- a/src/spelling/spellcheckdecorator.cpp
+++ b/src/spelling/spellcheckdecorator.cpp
@@ -11,7 +11,6 @@
 #include <QList>
 #include <QMenu>
 #include <QStringList>
-#include <QStringRef>
 #include <QTextBlock>
 #include <QTextBoundaryFinder> 
 #include <QTextCharFormat>