diff --git a/Cargo.toml b/Cargo.toml
index 4267877..5d4f2f5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ libc = "0.2"
 thiserror = "1.0"
 num-traits = "0.2"
 num-derive = "0.3"
-enumflags2 = "0.6.2"
+enumflags2 = "<= 0.6.2"
 bytes = "0.5"
 bitvec = "0.17"
 futures = "0.3"