diff --git a/src/core/kconfig.h b/src/core/kconfig.h
--- a/src/core/kconfig.h
+++ b/src/core/kconfig.h
@@ -64,7 +64,7 @@
  * KSharedConfig provides a set of open methods as counterparts for the
  * KConfig constructors.
  *
- * \sa KSharedConfig, KConfigGroup, <a href="http://techbase.kde.org/index.php?title=Development/Tutorials/KConfig">the techbase HOWTO on KConfig</a>.
+ * \sa KSharedConfig, KConfigGroup, <a href="https://techbase.kde.org/index.php?title=Development/Tutorials/KConfig">the techbase HOWTO on KConfig</a>.
  */
 class KCONFIGCORE_EXPORT KConfig : public KConfigBase
 {
diff --git a/src/core/kdesktopfile.h b/src/core/kdesktopfile.h
--- a/src/core/kdesktopfile.h
+++ b/src/core/kdesktopfile.h
@@ -33,7 +33,7 @@
  *
  * @author Pietro Iglio <iglio@kde.org>
  * @see  KConfigBase  KConfig
- * @see <a href="http://standards.freedesktop.org/desktop-entry-spec/latest/">Desktop Entry Spec</a>
+ * @see <a href="https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html">Desktop Entry Spec</a>
  */
 class KCONFIGCORE_EXPORT KDesktopFile : public KConfig
 {
diff --git a/src/kconfig_compiler/kconfig_compiler.cpp b/src/kconfig_compiler/kconfig_compiler.cpp
--- a/src/kconfig_compiler/kconfig_compiler.cpp
+++ b/src/kconfig_compiler/kconfig_compiler.cpp
@@ -1877,7 +1877,7 @@
         }
     }
     h << endl;
-    
+
 
     // Constructor or singleton accessor
     if (!cfg.singleton) {
@@ -2446,7 +2446,7 @@
 
     if (hasSignals) {
         // this cast to base-class pointer-to-member is valid C++
-        // http://stackoverflow.com/questions/4272909/is-it-safe-to-upcast-a-method-pointer-and-use-it-with-base-class-pointer/
+        // https://stackoverflow.com/questions/4272909/is-it-safe-to-upcast-a-method-pointer-and-use-it-with-base-class-pointer/
         cpp << "  KConfigCompilerSignallingItem::NotifyFunction notifyFunction ="
             << " static_cast<KConfigCompilerSignallingItem::NotifyFunction>(&"
             << cfg.className << "::itemChanged);" << endl << endl;