diff --git a/Project.toml b/Project.toml
index 2177892..5c98404 100644
--- a/Project.toml
+++ b/Project.toml
@@ -16,7 +16,7 @@ aws_c_iot_jll = "ac3cf774-1c31-5ab1-b91e-e77d3fbc835d"
 [compat]
 Aqua = "0.7"
 CEnum = "0.5"
-LibAwsCal = "=1.0.0"
+LibAwsCal = "=1.0.0, 1"
 LibAwsCommon = "=1.0.0"
 LibAwsCompression = "=1.0.0"
 LibAwsHTTP = "=1.0.0"