diff --git a/nghttp2.spec b/nghttp2.spec
index 304522c..963db68 100644
--- a/nghttp2.spec
+++ b/nghttp2.spec
@@ -45,6 +45,8 @@ for building applications with libnghttp2.
 %prep
 %setup -q
 
+# make fetch-ocsp-response use Python 3
+sed -e '1 s|^#!/.*python|&3|' -i script/fetch-ocsp-response
 
 %build
 %configure PYTHON=%{__python3}              \