diff --git a/dockerfiles/python_java/Dockerfile b/dockerfiles/python-java/Dockerfile
similarity index 100%
rename from dockerfiles/python_java/Dockerfile
rename to dockerfiles/python-java/Dockerfile
diff --git a/dockerfiles/python_java/Makefile b/dockerfiles/python-java/Makefile
similarity index 92%
rename from dockerfiles/python_java/Makefile
rename to dockerfiles/python-java/Makefile
index 8317066..0c69d9c 100644
--- a/dockerfiles/python_java/Makefile
+++ b/dockerfiles/python-java/Makefile
@@ -10,4 +10,4 @@ run:
     	-it \
     	-v $(shell pwd)/../../:/cjvt-srl-tagging \
     	python-java \
-    	/bin/bash
\ No newline at end of file
+    	/bin/bash
diff --git a/dockerfiles/python_java/README.md b/dockerfiles/python-java/README.md
similarity index 100%
rename from dockerfiles/python_java/README.md
rename to dockerfiles/python-java/README.md