diff --git a/Dockerfile b/Dockerfile
index 7776295..caf6529 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,8 @@
 FROM ruby
 MAINTAINER think@hotmail.de
 
-RUN gem install gherkin_format --no-format-exec
+RUN gem install gherkin --version=2.12.2 \
+ && gem install gherkin_format --no-format-exec
 
 ENV LC_ALL=C.UTF-8