diff --git a/.github/workflows/inspect.yml b/.github/workflows/inspect.yml
index 549d0760e..c8a2c8aa8 100644
--- a/.github/workflows/inspect.yml
+++ b/.github/workflows/inspect.yml
@@ -28,7 +28,7 @@ jobs:
     - name: Fetch Deps
       run: yarn install --frozen-lockfile
 
-  lint:
+  build:
     runs-on: ubuntu-latest
     needs: fetch
     steps:
@@ -47,12 +47,20 @@ jobs:
         key: ${{ runner.os }}-yarn-${{ hashFiles( 'yarn.lock' ) }}
         restore-keys: |
           ${{ runner.os }}-yarn-
-    - name: Lint
-      run: yarn lint
+    - name: Build
+      run: yarn build
+    - name: Upload Builds
+      uses: actions/upload-artifact@v3
+      with:
+        name: build
+        path: |
+          packages/*/lib/
+          packages/*/types/
+          packages/*/ts*/
 
-  test:
+  lint:
     runs-on: ubuntu-latest
-    needs: fetch
+    needs: build
     steps:
     - name: Checkout
       uses: actions/checkout@v3
@@ -69,12 +77,17 @@ jobs:
         key: ${{ runner.os }}-yarn-${{ hashFiles( 'yarn.lock' ) }}
         restore-keys: |
           ${{ runner.os }}-yarn-
-    - name: Test
-      run: yarn test
+    - name: Download Builds
+      uses: actions/download-artifact@v3
+      with:
+        name: build
+        path: packages
+    - name: Lint
+      run: yarn lint
 
-  build:
+  test:
     runs-on: ubuntu-latest
-    needs: fetch
+    needs: build
     steps:
     - name: Checkout
       uses: actions/checkout@v3
@@ -91,16 +104,13 @@ jobs:
         key: ${{ runner.os }}-yarn-${{ hashFiles( 'yarn.lock' ) }}
         restore-keys: |
           ${{ runner.os }}-yarn-
-    - name: Build
-      run: yarn build
-    - name: Upload Builds
-      uses: actions/upload-artifact@v3
+    - name: Download Builds
+      uses: actions/download-artifact@v3
       with:
         name: build
-        path: |
-          packages/*/lib/
-          packages/*/types/
-          packages/*/ts*/
+        path: packages
+    - name: Test
+      run: yarn test
 
   docs:
     runs-on: ubuntu-latest
diff --git a/packages/three-vrm-core/src/humanoid/VRMHumanBoneName.ts b/packages/three-vrm-core/src/humanoid/VRMHumanBoneName.ts
index 6538e344d..e6503bc62 100644
--- a/packages/three-vrm-core/src/humanoid/VRMHumanBoneName.ts
+++ b/packages/three-vrm-core/src/humanoid/VRMHumanBoneName.ts
@@ -26,8 +26,8 @@ export const VRMHumanBoneName = {
   RightUpperArm: 'rightUpperArm',
   RightLowerArm: 'rightLowerArm',
   RightHand: 'rightHand',
+  LeftThumbMetacarpal: 'leftThumbMetacarpal',
   LeftThumbProximal: 'leftThumbProximal',
-  LeftThumbIntermediate: 'leftThumbIntermediate',
   LeftThumbDistal: 'leftThumbDistal',
   LeftIndexProximal: 'leftIndexProximal',
   LeftIndexIntermediate: 'leftIndexIntermediate',
@@ -41,8 +41,8 @@ export const VRMHumanBoneName = {
   LeftLittleProximal: 'leftLittleProximal',
   LeftLittleIntermediate: 'leftLittleIntermediate',
   LeftLittleDistal: 'leftLittleDistal',
+  RightThumbMetacarpal: 'rightThumbMetacarpal',
   RightThumbProximal: 'rightThumbProximal',
-  RightThumbIntermediate: 'rightThumbIntermediate',
   RightThumbDistal: 'rightThumbDistal',
   RightIndexProximal: 'rightIndexProximal',
   RightIndexIntermediate: 'rightIndexIntermediate',
diff --git a/packages/three-vrm-core/src/humanoid/VRMHumanoidLoaderPlugin.ts b/packages/three-vrm-core/src/humanoid/VRMHumanoidLoaderPlugin.ts
index 4ffa990d6..fc419081a 100644
--- a/packages/three-vrm-core/src/humanoid/VRMHumanoidLoaderPlugin.ts
+++ b/packages/three-vrm-core/src/humanoid/VRMHumanoidLoaderPlugin.ts
@@ -8,6 +8,16 @@ import { GLTF as GLTFSchema } from '@gltf-transform/core';
 import { VRMHumanoidHelper } from './helpers/VRMHumanoidHelper';
 import { VRMHumanoidLoaderPluginOptions } from './VRMHumanoidLoaderPluginOptions';
 
+/**
+ * A map from old thumb bone names to new thumb bone names
+ */
+const thumbBoneNameMap: { [key: string]: V1VRMSchema.HumanoidHumanBoneName | undefined } = {
+  leftThumbProximal: 'leftThumbMetacarpal',
+  leftThumbIntermediate: 'leftThumbProximal',
+  rightThumbProximal: 'rightThumbMetacarpal',
+  rightThumbIntermediate: 'rightThumbProximal',
+};
+
 /**
  * A plugin of GLTFLoader that imports a {@link VRMHumanoid} from a VRM extension of a GLTF.
  */
@@ -79,13 +89,30 @@ export class VRMHumanoidLoaderPlugin implements GLTFLoaderPlugin {
       return null;
     }
 
+    /**
+     * compat: 1.0-beta thumb bone names
+     *
+     * `true` if `leftThumbIntermediate` or `rightThumbIntermediate` exists
+     */
+    const existsPreviousThumbName =
+      (schemaHumanoid.humanBones as any).leftThumbIntermediate != null ||
+      (schemaHumanoid.humanBones as any).rightThumbIntermediate != null;
+
     const humanBones: Partial<VRMHumanBones> = {};
     if (schemaHumanoid.humanBones != null) {
       await Promise.all(
         Object.entries(schemaHumanoid.humanBones).map(async ([boneNameString, schemaHumanBone]) => {
-          const boneName = boneNameString as V1VRMSchema.HumanoidHumanBoneName;
+          let boneName = boneNameString as V1VRMSchema.HumanoidHumanBoneName;
           const index = schemaHumanBone.node;
 
+          // compat: 1.0-beta previous thumb bone names
+          if (existsPreviousThumbName) {
+            const thumbBoneName = thumbBoneNameMap[boneName];
+            if (thumbBoneName != null) {
+              boneName = thumbBoneName;
+            }
+          }
+
           const node = await this.parser.getDependency('node', index);
 
           // if the specified node does not exist, emit a warning
@@ -143,17 +170,21 @@ export class VRMHumanoidLoaderPlugin implements GLTFLoaderPlugin {
             return;
           }
 
+          // map to new bone name
+          const thumbBoneName = thumbBoneNameMap[boneName];
+          const newBoneName = (thumbBoneName ?? boneName) as V1VRMSchema.HumanoidHumanBoneName;
+
           // v0 VRMs might have a multiple nodes attached to a single bone...
           // so if there already is an entry in the `humanBones`, show a warning and ignore it
-          if (humanBones[boneName] != null) {
+          if (humanBones[newBoneName] != null) {
             console.warn(
-              `Multiple bone entries for ${boneName} detected (index = ${index}), ignoring duplicated entries.`,
+              `Multiple bone entries for ${newBoneName} detected (index = ${index}), ignoring duplicated entries.`,
             );
             return;
           }
 
           // set to the `humanBones`
-          humanBones[boneName] = { node };
+          humanBones[newBoneName] = { node };
         }),
       );
     }
diff --git a/packages/three-vrm/examples/models/three-vrm-girl.vrm b/packages/three-vrm/examples/models/three-vrm-girl.vrm
index 6d862126c..5e11e0a74 100644
Binary files a/packages/three-vrm/examples/models/three-vrm-girl.vrm and b/packages/three-vrm/examples/models/three-vrm-girl.vrm differ
diff --git a/packages/types-vrmc-vrm-1.0/src/HumanoidHumanBoneName.ts b/packages/types-vrmc-vrm-1.0/src/HumanoidHumanBoneName.ts
index e266c3e15..ee982cda1 100644
--- a/packages/types-vrmc-vrm-1.0/src/HumanoidHumanBoneName.ts
+++ b/packages/types-vrmc-vrm-1.0/src/HumanoidHumanBoneName.ts
@@ -24,8 +24,8 @@ export type HumanoidHumanBoneName =
   | 'rightUpperArm'
   | 'rightLowerArm'
   | 'rightHand'
+  | 'leftThumbMetacarpal'
   | 'leftThumbProximal'
-  | 'leftThumbIntermediate'
   | 'leftThumbDistal'
   | 'leftIndexProximal'
   | 'leftIndexIntermediate'
@@ -39,8 +39,8 @@ export type HumanoidHumanBoneName =
   | 'leftLittleProximal'
   | 'leftLittleIntermediate'
   | 'leftLittleDistal'
+  | 'rightThumbMetacarpal'
   | 'rightThumbProximal'
-  | 'rightThumbIntermediate'
   | 'rightThumbDistal'
   | 'rightIndexProximal'
   | 'rightIndexIntermediate'