diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9d76b88d2f87b4f7b6c6c4a228c1a2982e77f81..0fec06b1f18340e95850398af791bd6b6fe587b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
 <!-- Do not manually edit this file, use `update-changelogs` -->
+0.40.1 (April 14th, 2022)
+=========================
+**New this release:**
+- Undo the MSRV bump from v1.56.1 to v1.58.1
+
 0.40.0 (April 13th, 2022)
 =========================
 **Breaking Changes:**
diff --git a/gradle.properties b/gradle.properties
index b761b2d62b92cdea2b6dbeff1caf62b204c817ed..4506267694433b485c9ec45ffeafd83d4da55991 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@
 #
 
 # Rust MSRV (entered into the generated README)
-rust.msrv=1.58.1
+rust.msrv=1.56.1
 
 # Version number to use for the generated SDK
 # Note: these must always be full 3-segment semver versions