diff --git a/Assets/VRM.Samples/Editor/Tests/VRM.Samples.Editor.Tests.asmdef b/Assets/VRM.Samples/Editor/Tests/VRM.Samples.Editor.Tests.asmdef
index c2f386cb3..f80e8a0a6 100644
--- a/Assets/VRM.Samples/Editor/Tests/VRM.Samples.Editor.Tests.asmdef
+++ b/Assets/VRM.Samples/Editor/Tests/VRM.Samples.Editor.Tests.asmdef
@@ -3,7 +3,8 @@
     "references": [
         "VRM",
         "VRM.Samples",
-        "UniVRM.Editor.Tests"
+        "UniVRM.Editor.Tests",
+        "UniJSON"
     ],
     "optionalUnityReferences": [
         "TestAssemblies"
diff --git a/Assets/VRM/UniGLTF/Editor/Tests/UniGLTF.Editor.Tests.asmdef b/Assets/VRM/UniGLTF/Editor/Tests/UniGLTF.Editor.Tests.asmdef
index 264580196..55dedf4d2 100644
--- a/Assets/VRM/UniGLTF/Editor/Tests/UniGLTF.Editor.Tests.asmdef
+++ b/Assets/VRM/UniGLTF/Editor/Tests/UniGLTF.Editor.Tests.asmdef
@@ -1,7 +1,8 @@
 {
     "name": "UniGLTF.Editor.Tests",
     "references": [
-        "VRM"
+        "VRM",
+        "UniJSON"
     ],
     "optionalUnityReferences": [
         "TestAssemblies"
diff --git a/Assets/VRM/UniJSON/Editor/Tests/UniJSON.Editor.Tests.asmdef b/Assets/VRM/UniJSON/Editor/Tests/UniJSON.Editor.Tests.asmdef
index a5f645e79..7b5a55039 100644
--- a/Assets/VRM/UniJSON/Editor/Tests/UniJSON.Editor.Tests.asmdef
+++ b/Assets/VRM/UniJSON/Editor/Tests/UniJSON.Editor.Tests.asmdef
@@ -1,7 +1,7 @@
 {
     "name": "UniJSON.Editor.Tests",
     "references": [
-        "VRM"
+        "UniJSON"
     ],
     "optionalUnityReferences": [
         "TestAssemblies"
diff --git a/Assets/VRM/UniJSON/UniJSON.asmdef b/Assets/VRM/UniJSON/UniJSON.asmdef
new file mode 100644
index 000000000..54ea498ab
--- /dev/null
+++ b/Assets/VRM/UniJSON/UniJSON.asmdef
@@ -0,0 +1,3 @@
+{
+	"name": "UniJSON"
+}
diff --git a/Assets/VRM/UniJSON/UniJSON.asmdef.meta b/Assets/VRM/UniJSON/UniJSON.asmdef.meta
new file mode 100644
index 000000000..9e8f01352
--- /dev/null
+++ b/Assets/VRM/UniJSON/UniJSON.asmdef.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 5dad3aa3e33a0ea48b088de553c50bf7
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM/UniVRM/Editor/Tests/UniVRM.Editor.Tests.asmdef b/Assets/VRM/UniVRM/Editor/Tests/UniVRM.Editor.Tests.asmdef
index a48539dbe..2b3357214 100644
--- a/Assets/VRM/UniVRM/Editor/Tests/UniVRM.Editor.Tests.asmdef
+++ b/Assets/VRM/UniVRM/Editor/Tests/UniVRM.Editor.Tests.asmdef
@@ -1,7 +1,8 @@
 {
     "name": "UniVRM.Editor.Tests",
     "references": [
-        "VRM"
+        "VRM",
+        "UniJSON"
     ],
     "optionalUnityReferences": [
         "TestAssemblies"
diff --git a/Assets/VRM/UniVRM/Editor/UniVRM.Editor.asmdef b/Assets/VRM/UniVRM/Editor/UniVRM.Editor.asmdef
index a290f9795..35b3e6254 100644
--- a/Assets/VRM/UniVRM/Editor/UniVRM.Editor.asmdef
+++ b/Assets/VRM/UniVRM/Editor/UniVRM.Editor.asmdef
@@ -1,7 +1,8 @@
 {
     "name": "UniVRM.Editor",
     "references": [
-        "VRM"
+        "VRM",
+        "UniJSON"
     ],
     "optionalUnityReferences": [],
     "includePlatforms": [
diff --git a/Assets/VRM/VRM.asmdef b/Assets/VRM/VRM.asmdef
index e5f2caca9..f088e65c3 100644
--- a/Assets/VRM/VRM.asmdef
+++ b/Assets/VRM/VRM.asmdef
@@ -4,7 +4,8 @@
         "MToon",
         "DepthFirstScheduler",
         "UniUnlit",
-        "UniHumanoid"
+        "UniHumanoid",
+        "UniJSON"
     ],
     "optionalUnityReferences": [],
     "includePlatforms": [],