diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2cc83923b..70340d82d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -230,7 +230,7 @@ jobs:
         with:
           repository: minetest/irrlicht
           path: lib/irrlichtmt/
-          ref: "1.9.0mt5"
+          ref: "1.9.0mt6"
 
       - name: Restore from cache and run vcpkg
         uses: lukka/run-vcpkg@v7
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index c0278a38c..346e4f300 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -22,7 +22,7 @@ on:
       - '.github/workflows/macos.yml'
 
 env:
-  IRRLICHT_TAG: 1.9.0mt5
+  IRRLICHT_TAG: 1.9.0mt6
   MINETEST_GAME_REPO: https://github.com/minetest/minetest_game.git
   MINETEST_GAME_BRANCH: master
   MINETEST_GAME_NAME: minetest_game
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c225bfcd4..8e8186570 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,7 +9,7 @@ stages:
   - deploy
 
 variables:
-  IRRLICHT_TAG: "1.9.0mt5"
+  IRRLICHT_TAG: "1.9.0mt6"
   MINETEST_GAME_REPO: "https://github.com/minetest/minetest_game.git"
   CONTAINER_IMAGE: registry.gitlab.com/$CI_PROJECT_PATH
 
diff --git a/util/buildbot/buildwin32.sh b/util/buildbot/buildwin32.sh
index e0c431711..89d97c54e 100755
--- a/util/buildbot/buildwin32.sh
+++ b/util/buildbot/buildwin32.sh
@@ -45,7 +45,7 @@ done
 	echo "The compiler runtime DLLs could not be found, they might be missing in the final package."
 
 # Get stuff
-irrlicht_version=1.9.0mt5
+irrlicht_version=1.9.0mt6
 ogg_version=1.3.5
 openal_version=1.21.1
 vorbis_version=1.3.7
diff --git a/util/buildbot/buildwin64.sh b/util/buildbot/buildwin64.sh
index e79397be4..5648962ed 100755
--- a/util/buildbot/buildwin64.sh
+++ b/util/buildbot/buildwin64.sh
@@ -45,7 +45,7 @@ done
 	echo "The compiler runtime DLLs could not be found, they might be missing in the final package."
 
 # Get stuff
-irrlicht_version=1.9.0mt5
+irrlicht_version=1.9.0mt6
 ogg_version=1.3.5
 openal_version=1.21.1
 vorbis_version=1.3.7
diff --git a/util/ci/common.sh b/util/ci/common.sh
index 82529c712..16327ec30 100644
--- a/util/ci/common.sh
+++ b/util/ci/common.sh
@@ -13,7 +13,7 @@ install_linux_deps() {
 		shift
 		pkgs+=(libirrlicht-dev)
 	else
-		wget "https://github.com/minetest/irrlicht/releases/download/1.9.0mt5/ubuntu-bionic.tar.gz"
+		wget "https://github.com/minetest/irrlicht/releases/download/1.9.0mt6/ubuntu-bionic.tar.gz"
 		sudo tar -xaf ubuntu-bionic.tar.gz -C /usr/local
 	fi