diff --git a/Dockerfile b/Dockerfile
index ebea0458130daab9f8f44a5d7d5ad5d8449e2ade..0e54ffd65908c00fba9291c5d317f462a2099700 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ENV RAILS_ENV=production \
     DISCOURSE_SERVE_STATIC_ASSETS=true \
     GIFSICLE_VERSION=1.88 \
     PNGQUANT_VERSION=2.8.0 \
-    DISCOURSE_VERSION=2.0.0.beta5 \
+    DISCOURSE_VERSION=2.2.0.beta2 \
     BUILD_DEPS="\
       autoconf \
       jhead \