diff --git a/package-lock.json b/package-lock.json
index 68a02a99..30132a90 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "photo-location-map",
-  "version": "1.9.1-alpha",
+  "version": "1.10.0-rc.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "photo-location-map",
-      "version": "1.9.1-alpha",
+      "version": "1.10.0-rc.1",
       "hasInstallScript": true,
       "dependencies": {
         "@electron/remote": "2.1.2",
diff --git a/package.json b/package.json
index 5566e4f1..732ceab2 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "photo-location-map",
   "productName": "Photo Location Map",
-  "version": "1.9.1-alpha",
+  "version": "1.10.0-rc.1",
   "description": "Display the locations where photos were taken on a map.",
   "homepage": "https://github.com/TomoyukiAota/photo-location-map",
   "author": {