3 files changed, 11 insertions, 2 deletions
diff --git a/packages/json-schemas/CHANGELOG.json b/packages/json-schemas/CHANGELOG.json
index 31da6a7f7..33cf126e3 100644
--- a/packages/json-schemas/CHANGELOG.json
+++ b/packages/json-schemas/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "1.0.1-rc.4",
+        "changes": [
+            {
+                "note": "Change hexSchema to match `0x`",
+                "pr": 937
+            }
+        ]
+    },
+    {
         "version": "1.0.1-rc.3",
         "changes": [
             {
diff --git a/packages/json-schemas/schemas/basic_type_schemas.ts b/packages/json-schemas/schemas/basic_type_schemas.ts
index 7565df9e0..301f9ec73 100644
--- a/packages/json-schemas/schemas/basic_type_schemas.ts
+++ b/packages/json-schemas/schemas/basic_type_schemas.ts
@@ -7,7 +7,7 @@ export const addressSchema = {
 export const hexSchema = {
     id: '/Hex',
     type: 'string',
-    pattern: '^0x([0-9a-f][0-9a-f])+$',
+    pattern: '^0x(([0-9a-f][0-9a-f])+)?$',
 };
 
 export const numberSchema = {
diff --git a/packages/json-schemas/test/schema_test.ts b/packages/json-schemas/test/schema_test.ts
index d202b5643..f84553df1 100644
--- a/packages/json-schemas/test/schema_test.ts
+++ b/packages/json-schemas/test/schema_test.ts
@@ -89,7 +89,7 @@ describe('Schema', () => {
             validateAgainstSchema(testCases, hexSchema);
         });
         it('should fail for invalid hex string', () => {
-            const testCases = ['0x', '0', '0xzzzzzzB11a196601eD2ce54B665CaFEca0347D42'];
+            const testCases = ['0', '0xzzzzzzB11a196601eD2ce54B665CaFEca0347D42'];
             const shouldFail = true;
             validateAgainstSchema(testCases, hexSchema, shouldFail);
         });