diff --git a/Dockerfile b/Dockerfile
index 86e086f..7e82a9d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,6 @@
-FROM mediawiki:1.35
+FROM mediawiki:1.36
 
-# Plugins are not compatible with composer 2 yet
-ARG COMPOSER_VERSION=1.10.21
+ARG COMPOSER_VERSION=2.1.6
 
 ENV \
     WG_SITENAME="Test Wiki" \
@@ -60,11 +59,11 @@ RUN set -eu; \
 # JsonConfig required by Graph.
 RUN set -eu; \
     cd /var/www/html/extensions; \
-    curl https://extdist.wmflabs.org/dist/extensions/JsonConfig-REL1_35-1b79879.tar.gz |tar -xz; \
-    curl https://extdist.wmflabs.org/dist/extensions/Graph-REL1_35-09f0338.tar.gz |tar -xz; \
-    curl https://extdist.wmflabs.org/dist/extensions/SubPageList3-REL1_35-622c298.tar.gz |tar -xz; \
-    curl https://extdist.wmflabs.org/dist/extensions/MsUpload-REL1_35-5998b96.tar.gz |tar -xz; \
-    curl https://extdist.wmflabs.org/dist/extensions/TemplateStyles-REL1_35-7a40a6a.tar.gz |tar -xz
+    curl https://extdist.wmflabs.org/dist/extensions/JsonConfig-REL1_36-609a991.tar.gz |tar -xz; \
+    curl https://extdist.wmflabs.org/dist/extensions/Graph-REL1_36-67b02d1.tar.gz |tar -xz; \
+    curl https://extdist.wmflabs.org/dist/extensions/SubPageList3-REL1_36-f5d7175.tar.gz |tar -xz; \
+    curl https://extdist.wmflabs.org/dist/extensions/MsUpload-REL1_36-a6bfb91.tar.gz |tar -xz; \
+    curl https://extdist.wmflabs.org/dist/extensions/TemplateStyles-REL1_36-b82a604.tar.gz |tar -xz
 
 # Install composer packages
 RUN set -eu; \
diff --git a/composer.local.json b/composer.local.json
index fd3d46b..1cf7f3f 100644
--- a/composer.local.json
+++ b/composer.local.json
@@ -1,8 +1,8 @@
 {
     "require": {
-        "mediawiki/semantic-bundle": "~4.0",
+        "mediawiki/semantic-bundle": "~5.0",
         "mediawiki/semantic-scribunto": "~2.1",
 
-        "wikimedia/css-sanitizer": "2.0.1"
+        "wikimedia/css-sanitizer": "3.0.2"
     }
 }
\ No newline at end of file