diff --git a/setup.py b/setup.py
index 41977213..6a151ee7 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ README_MD = open(join(dirname(abspath(__file__)), "README.md")).read()
 
 setup(
     name="trueupdate",
-    version="2.1.3",
+    version="2.1.4",
 
     # The packages that constitute your project.
     # For my project, I have only one - "pydash".
diff --git a/trueupdate/__init__.py b/trueupdate/__init__.py
index a402b9ff..3dd3d687 100644
--- a/trueupdate/__init__.py
+++ b/trueupdate/__init__.py
@@ -111,7 +111,7 @@ def sync_catalog():
 def docker_prune():
     if PRUNE:
       print("Pruning old docker images...\n")
-      process = subprocess.Popen(["docker", "image ", "prune", "-a", "-f"], stdout=subprocess.PIPE)
+      process = subprocess.Popen(["docker", "image ", "prune", "-af"], stdout=subprocess.PIPE)
       while process.poll() is None:
           lines = process.stdout.readline()
           print (lines)