diff --git a/python-urllib3.spec b/python-urllib3.spec
index 14d0514..8b70f06 100644
--- a/python-urllib3.spec
+++ b/python-urllib3.spec
@@ -51,6 +51,7 @@ BuildRequires:  python3-six
 BuildRequires:  python3-pysocks
 BuildRequires:  python3-pytest
 BuildRequires:  python3-tornado
+BuildRequires:  python3-trustme
 BuildRequires:  python3-idna
 %endif