diff --git a/debian/changelog b/debian/changelog
index 30325d5..554f044 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,7 @@
   * Add Rules-Requires-Root field to control.
   * New upstream release (5.69.0).
   * Update build-deps and deps with the info from cmake.
+  * Enable hardening all.
 
  -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Tue, 14 Apr 2020 03:58:13 +0200
 
diff --git a/debian/rules b/debian/rules
index 01a1f37..b08d8be 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,6 +1,7 @@
 #!/usr/bin/make -f
 # -*- makefile -*-
 
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 export DEB_LDFLAGS_MAINT_APPEND := -Wl,--as-needed
 
 %: