diff --git a/Cargo.lock b/Cargo.lock
index 56b7441..919ff18 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2256,9 +2256,9 @@ dependencies = [
 
 [[package]]
 name = "psm"
-version = "0.1.24"
+version = "0.1.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "200b9ff220857e53e184257720a14553b2f4aa02577d2ed9842d45d4b9654810"
+checksum = "5787f7cda34e3033a72192c018bc5883100330f362ef279a8cbccfce8bb4e874"
 dependencies = [
  "cc",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 652c66c..cbbab8c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,4 +27,4 @@ ruint = "1"
 num-bigint = "0.4"
 mimalloc = "0.1.43"
 # force psm to older version so it compiles in Github pipeline https://github.com/rust-lang/stacker/issues/96
-psm = "0.1.21"
+psm = "=0.1.21"