diff --git a/Dockerfile b/Dockerfile
index d182541..1b65b34 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,5 +19,5 @@ RUN apt-get update \
 	&& apt-get install --yes --no-install-recommends libldap2-dev libpq-dev \
 	&& docker-php-ext-install ldap pgsql pdo pdo_pgsql \
 	&& rm -rf /var/lib/apt/lists \
-	&& curl https://extdist.wmflabs.org/dist/extensions/LDAPProvider-master-aa77bbb.tar.gz --output /tmp/ldapprovider.tar.gz \
+	&& curl https://extdist.wmflabs.org/dist/extensions/LDAPProvider-REL1_31-e9595e6.tar.gz --output /tmp/ldapprovider.tar.gz \
 	&& tar --extract --file=/tmp/ldapprovider.tar.gz --directory=/var/www/html/extensions