diff --git a/pyproject.toml b/pyproject.toml
index 4c362a679e..fc2319865a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ did-peer-4 = "^0.1.4"
 uuid_utils = "^0.9.0"
 
 # askar
-aries-askar-ff137 = {version = "^0.3.3b1", source = "testpypi", optional = true}
+aries-askar-ff137 = {version = "==0.3.3b0", source = "testpypi", optional = true}
 indy-credx= { version = "~1.1.1", optional = true }
 indy-vdr= { version = "~0.4.0", optional = true }
 anoncreds= { version = "0.2.0", optional = true }