diff --git a/Cargo.toml b/Cargo.toml
index 6f81fe0..f9d03c8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,7 +43,7 @@ indexmap = { version = "1.3.2", optional = true }
 indoc = { version = "1.0", optional = true }
 jsonwebtoken = { version = "7.1.0", optional = true }
 once_cell = { version = "1.5", optional = true }
-openapiv3 = { version = "0.3.2", optional = true }
+openapiv3 = { version = "=0.3.2", optional = true }
 regex = { version = "1.4", optional = true }
 sha2 = { version = "0.9.3", optional = true }