diff --git a/contracts/asset-proxy/package.json b/contracts/asset-proxy/package.json
index 5cd9604cd2..6d4ba8b8bf 100644
--- a/contracts/asset-proxy/package.json
+++ b/contracts/asset-proxy/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-asset-proxy",
-    "version": "2.2.3",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -65,9 +65,9 @@
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
         "@0x/contracts-test-utils": "^2.0.1",
-        "@0x/contracts-erc20": "^1.0.6",
-        "@0x/contracts-erc721": "^1.0.6",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-erc20": "^1.0.0",
+        "@0x/contracts-erc721": "^1.0.0",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/order-utils": "^3.1.2",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
diff --git a/contracts/erc20/package.json b/contracts/erc20/package.json
index 36420c32cc..7616b9ccfa 100644
--- a/contracts/erc20/package.json
+++ b/contracts/erc20/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc20",
-    "version": "1.0.6",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -65,8 +65,8 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-exchange-libs": "^1.0.6",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-exchange-libs": "^1.0.0",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
diff --git a/contracts/erc721/package.json b/contracts/erc721/package.json
index cdf551234e..8e83ea4e45 100644
--- a/contracts/erc721/package.json
+++ b/contracts/erc721/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc721",
-    "version": "1.0.6",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -65,7 +65,7 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
diff --git a/contracts/exchange-forwarder/package.json b/contracts/exchange-forwarder/package.json
index 3383df990a..7ec103746b 100644
--- a/contracts/exchange-forwarder/package.json
+++ b/contracts/exchange-forwarder/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-forwarder",
-    "version": "1.2.3",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -66,12 +66,12 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-asset-proxy": "^2.2.3",
-        "@0x/contracts-exchange-libs": "^1.0.6",
-        "@0x/contracts-exchange": "^2.2.3",
-        "@0x/contracts-erc20": "^1.0.6",
-        "@0x/contracts-erc721": "^1.0.6",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-asset-proxy": "^1.0.0",
+        "@0x/contracts-exchange-libs": "^1.0.0",
+        "@0x/contracts-exchange": "^1.0.0",
+        "@0x/contracts-erc20": "^1.0.0",
+        "@0x/contracts-erc721": "^1.0.0",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/order-utils": "^3.1.2",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
diff --git a/contracts/exchange-libs/CHANGELOG.json b/contracts/exchange-libs/CHANGELOG.json
index a51a1a08a0..cdaac93ea2 100644
--- a/contracts/exchange-libs/CHANGELOG.json
+++ b/contracts/exchange-libs/CHANGELOG.json
@@ -1,6 +1,6 @@
 [
     {
-        "version": "3.0.0",
+        "version": "1.0.0",
         "changes": [
             {
                 "note": "Rename contracts-libs to contracts-exchange-libs",
@@ -11,59 +11,5 @@
                 "pr": 1539
             }
         ]
-    },
-    {
-        "version": "2.0.0",
-        "changes": [
-            {
-                "note": "Upgrade the bignumber.js to v8.0.2",
-                "pr": 1517
-            }
-        ]
-    },
-    {
-        "timestamp": 1547747677,
-        "version": "1.0.6",
-        "changes": [
-            {
-                "note": "Dependencies updated"
-            }
-        ]
-    },
-    {
-        "timestamp": 1547561734,
-        "version": "1.0.5",
-        "changes": [
-            {
-                "note": "Dependencies updated"
-            }
-        ]
-    },
-    {
-        "timestamp": 1547225310,
-        "version": "1.0.4",
-        "changes": [
-            {
-                "note": "Dependencies updated"
-            }
-        ]
-    },
-    {
-        "timestamp": 1547040760,
-        "version": "1.0.3",
-        "changes": [
-            {
-                "note": "Dependencies updated"
-            }
-        ]
-    },
-    {
-        "timestamp": 1544741676,
-        "version": "1.0.2",
-        "changes": [
-            {
-                "note": "Dependencies updated"
-            }
-        ]
     }
 ]
diff --git a/contracts/exchange-libs/package.json b/contracts/exchange-libs/package.json
index 799ba360be..9d35106cc0 100644
--- a/contracts/exchange-libs/package.json
+++ b/contracts/exchange-libs/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-libs",
-    "version": "1.0.6",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -65,7 +65,7 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/order-utils": "^3.1.2",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
diff --git a/contracts/exchange/package.json b/contracts/exchange/package.json
index ebe3a17b34..9d7db18627 100644
--- a/contracts/exchange/package.json
+++ b/contracts/exchange/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange",
-    "version": "2.2.3",
+    "version": "1.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -64,12 +64,12 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-asset-proxy": "^2.2.3",
-        "@0x/contracts-exchange-libs": "^1.0.6",
+        "@0x/contracts-asset-proxy": "^1.0.0",
+        "@0x/contracts-exchange-libs": "^1.0.0",
         "@0x/contracts-test-utils": "^2.0.1",
-        "@0x/contracts-erc20": "^1.0.6",
-        "@0x/contracts-erc721": "^1.0.6",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-erc20": "^1.0.0",
+        "@0x/contracts-erc721": "^1.0.0",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/order-utils": "^3.1.2",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
diff --git a/contracts/extensions/package.json b/contracts/extensions/package.json
index e4adf63509..780244f37d 100644
--- a/contracts/extensions/package.json
+++ b/contracts/extensions/package.json
@@ -66,12 +66,12 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-asset-proxy": "^2.2.3",
-        "@0x/contracts-exchange-libs": "^1.0.6",
-        "@0x/contracts-exchange": "^2.2.3",
-        "@0x/contracts-erc20": "^1.0.6",
-        "@0x/contracts-erc721": "^1.0.6",
-        "@0x/contracts-utils": "^1.0.6",
+        "@0x/contracts-asset-proxy": "^1.0.0",
+        "@0x/contracts-exchange-libs": "^1.0.0",
+        "@0x/contracts-exchange": "^1.0.0",
+        "@0x/contracts-erc20": "^1.0.0",
+        "@0x/contracts-erc721": "^1.0.0",
+        "@0x/contracts-utils": "^3.0.0",
         "@0x/order-utils": "^3.1.2",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
diff --git a/contracts/multisig/package.json b/contracts/multisig/package.json
index 7315213b89..3282e0ae51 100644
--- a/contracts/multisig/package.json
+++ b/contracts/multisig/package.json
@@ -65,8 +65,8 @@
     },
     "dependencies": {
         "@0x/base-contract": "^3.0.13",
-        "@0x/contracts-asset-proxy": "^2.2.3",
-        "@0x/contracts-erc20": "^1.0.6",
+        "@0x/contracts-asset-proxy": "^1.0.0",
+        "@0x/contracts-erc20": "^1.0.0",
         "@0x/types": "^1.5.2",
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
diff --git a/contracts/utils/package.json b/contracts/utils/package.json
index 0b14ec7cfe..33d94cc332 100644
--- a/contracts/utils/package.json
+++ b/contracts/utils/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-utils",
-    "version": "1.0.6",
+    "version": "3.0.0",
     "engines": {
         "node": ">=6.12"
     },