diff --git a/python3-ecosystem.yaml b/python3-ecosystem.yaml
index ee64189..25b3307 100644
--- a/python3-ecosystem.yaml
+++ b/python3-ecosystem.yaml
@@ -18,15 +18,15 @@ data:
             - MIT
     dependencies:
         buildrequires:
-            bootstrap: master
+            bootstrap: f27
 
-            # python3: master
+            # python3: 3.6
                 # Disabled since python3 requires platform, and
                 # bootstrap and platform modules conflict
         requires:
-            platform: master
+            platform: f27
             python3: 3.6
-            libtom: master
+            libtom: f27
     references:
         community: https://www.python.org/
         documentation: https://docs.python.org/3/