diff --git a/CHANGELOG.md b/CHANGELOG.md
index b56c0a7..6cdeee4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 0.13.5
+* Hard version lock on sys dependency
+
 # 0.13.4
 * Tweak linking options, use snappy if available
 
diff --git a/Cargo.toml b/Cargo.toml
index 527783a..7faf66c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name          = "mongo_driver"
-version       = "0.13.4"
+version       = "0.13.5"
 authors       = ["Thijs Cadier <thijs@appsignal.com>"]
 description   = "Mongo Rust driver built on top of the Mongo C driver"
 readme        = "README.md"
@@ -24,7 +24,7 @@ serde_derive = "1.0"
 
 [dependencies.mongoc-sys]
 path    = "mongoc-sys"
-version = "1.17.5-1"
+version = "=1.17.5-1"
 
 [dev-dependencies]
 chrono = "^0.4"