diff --git a/Dockerfile b/Dockerfile
index 5a1faf9..54eec24 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG DOCKER_VERSION = '2.1.1279-p3399'
+ARG DOCKER_VERSION=2.1.1279-p3399
 FROM registry.jetbrains.team/p/writerside/builder/writerside-builder:${DOCKER_VERSION}
 
 COPY entrypoint.sh /entrypoint.sh