diff --git a/codexdht.nimble b/codexdht.nimble
index 36471a6..a4e0c0b 100644
--- a/codexdht.nimble
+++ b/codexdht.nimble
@@ -14,7 +14,7 @@ requires "bearssl >= 0.2.5 & < 0.3.0"
 requires "chronicles >= 0.11.2 & < 0.13.0"
 requires "chronos >= 4.2.2 & < 4.4.0"
 requires "libp2p >= 2.2.0 & < 3.0.0"
-requires "protobuf_serialization >= 0.5.3" < 0.6.0"
+requires "protobuf_serialization >= 0.5.3 & < 0.6.0"
 requires "metrics >= 0.2.2 & < 0.3.0"
 requires "stew >= 0.4.2"
 requires "stint >= 0.8.1 & < 0.9.0"