diff --git a/Cargo.toml b/Cargo.toml
index f93e325..50c9ed1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,7 +54,7 @@ parity-scale-codec = { version = "3", optional = true, features = [
     "derive",
     "max-encoded-len",
 ], default-features = false }
-primitive-types = { version = "0.12", optional = true, default-features = false }
+primitive-types = { version = "0.13", optional = true, default-features = false }
 proptest = { version = "1.2", optional = true, default-features = false }
 pyo3 = { version = "0.19", optional = true, default-features = false }
 quickcheck = { version = "1", optional = true, default-features = false }