diff --git a/setup.py b/setup.py
index db569c0fc74b59016a5e77c86ca41eb3963d80c1..8d53c52919f1082353f9ccfc67eb92844f1de601 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@ setup(
     tests_require=tests_require,
     install_requires=[
         'aiopg',
-        'jsonrpcserver',
+        'jsonrpcserver==3.5.6',
         'aiohttp',
         'certifi',
         'sqlalchemy',