diff --git a/setup.py b/setup.py
index 58aeb28..c874fbe 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,14 @@ array of URLs.""",
     author_email='jan@dittberner.info',
     url='http://debian-stuff.dittberner.info/ddportfolioservice',
     license='AGPL-3.0+',
-    install_requires=["Pylons>=0.9.6.2"],
+    install_requires=[
+        "Pylons==0.9.6.2",
+	"Paste==1.7.1",
+	"PasteDeploy==1.3.2",
+	"PasteScript==1.6.3",
+	"Routes==1.9.2",
+	"FormEncode==1.0.1",
+	"WebHelpers==0.6.1"],
     packages=find_packages(exclude=['ez_setup']),
     include_package_data=True,
     test_suite='nose.collector',