diff --git a/contracts/exchange/CHANGELOG.json b/contracts/exchange/CHANGELOG.json
index bd66451252..bacc2d6a4a 100644
--- a/contracts/exchange/CHANGELOG.json
+++ b/contracts/exchange/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "3.1.0",
+        "changes": [
+            {
+                "note": "Uses updated event decoding to properly decodes arrays and objects.",
+                "pr": 2443
+            }
+        ]
+    },
     {
         "timestamp": 1578272714,
         "version": "3.0.3",
diff --git a/contracts/utils/CHANGELOG.json b/contracts/utils/CHANGELOG.json
index f2bb4eefc2..0504112e44 100644
--- a/contracts/utils/CHANGELOG.json
+++ b/contracts/utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "4.1.0",
+        "changes": [
+            {
+                "note": "Replaced ethers with 0x ABI Encoder for decoding logs. Fixes decoding for arrays/objects.",
+                "pr": 2443
+            }
+        ]
+    },
     {
         "timestamp": 1578272714,
         "version": "4.0.3",