diff --git a/CMakeLists.txt b/CMakeLists.txt
index 589be0ab3..d8a9a1d65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ cmake_minimum_required(VERSION 3.1)
 
 project(NeoChat)
 
-set(KF5_MIN_VERSION "5.84.0")
+set(KF5_MIN_VERSION "5.86.0")
 set(QT_MIN_VERSION "5.15.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
@@ -18,6 +18,8 @@ set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+set(KDE_COMPILERSETTINGS_LEVEL 5.84)
+
 include(FeatureSummary)
 include(ECMSetupVersion)
 include(KDEInstallDirs)
@@ -70,7 +72,7 @@ if(ANDROID)
     )
 else()
     find_package(Qt5 ${QT_MIN_VERSION} COMPONENTS Widgets)
-    find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS QQC2DesktopStyle ConfigWidgets KIO WindowSystem Sonnet)
+    find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS QQC2DesktopStyle ConfigWidgets KIO WindowSystem Sonnet SyntaxHighlighting)
     set_package_properties(KF5QQC2DesktopStyle PROPERTIES
         TYPE RUNTIME
     )
diff --git a/imports/NeoChat/Menu/Timeline/MessageSourceSheet.qml b/imports/NeoChat/Menu/Timeline/MessageSourceSheet.qml
index e73816e25..2277acfa6 100644
--- a/imports/NeoChat/Menu/Timeline/MessageSourceSheet.qml
+++ b/imports/NeoChat/Menu/Timeline/MessageSourceSheet.qml
@@ -5,6 +5,7 @@
 import QtQuick 2.15
 import QtQuick.Controls 2.15
 
+import org.kde.syntaxhighlighting 1.0
 import org.kde.kirigami 2.15 as Kirigami
 
 Kirigami.OverlaySheet {
@@ -16,9 +17,16 @@ Kirigami.OverlaySheet {
     }
 
     TextArea {
+        id: sourceTextArea
         text: sourceText
         readOnly: true
         wrapMode: Text.WordWrap
+
+        SyntaxHighlighter {
+            textEdit: sourceTextArea
+            repository: Repository
+            definition: "JSON"
+        }
     }
 }
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b88b757e5..8774c8b26 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -60,7 +60,7 @@ if(NOT ANDROID)
 endif()
 
 target_include_directories(neochat PRIVATE ${CMAKE_BINARY_DIR})
-target_link_libraries(neochat PRIVATE Qt::Quick Qt::Qml Qt::Gui Qt::Network Qt::QuickControls2 KF5::I18n KF5::Kirigami2 KF5::Notifications KF5::ConfigCore KF5::ConfigGui KF5::CoreAddons Quotient cmark::cmark ${QTKEYCHAIN_LIBRARIES})
+target_link_libraries(neochat PRIVATE Qt::Quick Qt::Qml Qt::Gui Qt::Network Qt::QuickControls2 KF5::I18n KF5::Kirigami2 KF5::Notifications KF5::ConfigCore KF5::ConfigGui KF5::CoreAddons KF5::SyntaxHighlighting Quotient cmark::cmark ${QTKEYCHAIN_LIBRARIES})
 kconfig_add_kcfg_files(neochat GENERATE_MOC neochatconfig.kcfgc)
 
 if(NEOCHAT_FLATPAK)