diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b377c6..abfb346 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+# [0.1.0-develop.40](https://git.lumeweb.com/LumeWeb/libethsync/compare/v0.1.0-develop.39...v0.1.0-develop.40) (2023-07-14)
+
+
+### Bug Fixes
+
+* add a sync delay option so that the bls verification does not hog cpu ([824dcd9](https://git.lumeweb.com/LumeWeb/libethsync/commit/824dcd96339410ffa9f0afb744a1baf3bed722d6))
+
 # [0.1.0-develop.39](https://git.lumeweb.com/LumeWeb/libethsync/compare/v0.1.0-develop.38...v0.1.0-develop.39) (2023-07-13)
 
 
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 45d7055..f3a85b8 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,12 +1,12 @@
 {
     "name": "@lumeweb/libethclient",
-    "version": "0.1.0-develop.39",
+    "version": "0.1.0-develop.40",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@lumeweb/libethclient",
-            "version": "0.1.0-develop.39",
+            "version": "0.1.0-develop.40",
             "dependencies": {
                 "@chainsafe/as-sha256": "^0.3.1",
                 "@chainsafe/bls": "7.1.1",
diff --git a/package.json b/package.json
index d77dd76..e8b7509 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@lumeweb/libethsync",
-    "version": "0.1.0-develop.39",
+    "version": "0.1.0-develop.40",
     "type": "module",
     "repository": {
         "type": "git",