diff --git a/CHANGES.md b/CHANGES.md
index 59f62451e17..6f6ac8b64d3 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -40,6 +40,7 @@ To be released.
 ### Added APIs
 
  -  (Libplanet.Action) Added `ValidatorSetAccount` class.  [[#3745]]
+ -  (Libplanet.Explorer) Added `WorldState.version` field.  [[#3746]]
 
 ### Behavioral changes
 
@@ -56,6 +57,7 @@ To be released.
 [#3741]: https://github.com/planetarium/libplanet/pull/3741
 [#3742]: https://github.com/planetarium/libplanet/pull/3742
 [#3745]: https://github.com/planetarium/libplanet/pull/3745
+[#3746]: https://github.com/planetarium/libplanet/pull/3746
 
 
 Version 4.3.0
diff --git a/Libplanet.Explorer.Tests/Queries/StateQueryTest.cs b/Libplanet.Explorer.Tests/Queries/StateQueryTest.cs
index a7ed77e9a02..56dcc04e023 100644
--- a/Libplanet.Explorer.Tests/Queries/StateQueryTest.cs
+++ b/Libplanet.Explorer.Tests/Queries/StateQueryTest.cs
@@ -29,6 +29,7 @@ public async Task World()
             world(blockHash: ""01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b"") {
                 stateRootHash
                 legacy
+                version
             }
         }
         ", source: source);
@@ -40,6 +41,7 @@ public async Task World()
             Assert.IsAssignableFrom<IDictionary<string, object>>(resultDict["world"]);
         Assert.NotNull(states["stateRootHash"]);
         Assert.True((bool)states["legacy"]);
+        Assert.Equal(0, states["version"]);
     }
 
     [Fact]
diff --git a/Libplanet.Explorer/GraphTypes/WorldStateType.cs b/Libplanet.Explorer/GraphTypes/WorldStateType.cs
index 2773827402a..45b83e81cbb 100644
--- a/Libplanet.Explorer/GraphTypes/WorldStateType.cs
+++ b/Libplanet.Explorer/GraphTypes/WorldStateType.cs
@@ -25,6 +25,12 @@ public WorldStateType()
                 resolve: context => context.Source.Legacy
             );
 
+            Field<NonNullGraphType<IntGraphType>>(
+                name: "version",
+                description: "The version of the bakcing data model.",
+                resolve: context => context.Source.Version
+            );
+
             Field<NonNullGraphType<AccountStateType>>(
                 name: "account",
                 description: