diff --git a/requirements_static.txt b/requirements_static.txt
index 1aa02dcc..8efc2727 100644
--- a/requirements_static.txt
+++ b/requirements_static.txt
@@ -10,5 +10,5 @@ tinycss2==1.4.0
     # via -r requirements_static.in
 webencodings==0.5.1
     # via tinycss2
-zopfli==0.2.3
+zopfli==0.2.3.post1
     # via -r requirements_static.in