diff --git a/requirements/devel.txt b/requirements/devel.txt
index 3e85c2fb..ff509566 100644
--- a/requirements/devel.txt
+++ b/requirements/devel.txt
@@ -2,6 +2,7 @@
 -r install.txt
 appdirs
 setuptools
+sip == 5.5.0
 wheel
 twine
 requests