diff --git a/Project.toml b/Project.toml
index 3f99757..80655b1 100644
--- a/Project.toml
+++ b/Project.toml
@@ -24,7 +24,7 @@ HTTP = "^0.7.0, ^0.8.0, ^0.9.0"
 JSON = "^0.20.0, ^0.21.0"
 LibExpat = "^0.6.1"
 Graphs = "^1.4.1"
-ProtoBuf = "=0.11.3"
+ProtoBuf = "0.11.5"
 StableRNGs = "^1.0.0"
 julia = "^1.3.0"