diff --git a/package.json b/package.json
index 4757767..4e49bda 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "@types/express": "^5.0.2",
     "@types/jest": "^29.5.14",
     "@types/node": "^22.15.30",
-    "@types/react": "^18.3.12",
+    "@types/react": "^19.1.2",
     "@types/react-dom": "^18.2.25",
     "@types/webpack": "^5.28.5",
     "@types/ws": "^8.18.1",
@@ -43,8 +43,8 @@
     "lint-staged": "^15.5.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.5.3",
-    "react": "^18.3.1",
-    "react-dom": "^18.2.0",
+    "react": "^19.1.0",
+    "react-dom": "^19.1.0",
     "react-router": "^7.6.1",
     "ts-jest": "^29.3.2",
     "ts-loader": "^9.5.2",
diff --git a/src/client/components/QiitaMarkdownHtmlBody.tsx b/src/client/components/QiitaMarkdownHtmlBody.tsx
index 4317a65..036b2a6 100644
--- a/src/client/components/QiitaMarkdownHtmlBody.tsx
+++ b/src/client/components/QiitaMarkdownHtmlBody.tsx
@@ -9,7 +9,7 @@ export const QiitaMarkdownHtmlBody = ({
   bodyRef,
 }: {
   renderedBody: string;
-  bodyRef: RefObject<HTMLDivElement>;
+  bodyRef: RefObject<HTMLDivElement | null>;
 }) => {
   const [isRendered, setIsRendered] = useState(false);
 
diff --git a/src/client/components/Slide/SlideViewerContent.tsx b/src/client/components/Slide/SlideViewerContent.tsx
index 6ea4043..587292f 100644
--- a/src/client/components/Slide/SlideViewerContent.tsx
+++ b/src/client/components/Slide/SlideViewerContent.tsx
@@ -13,7 +13,7 @@ export const SlideViewerContent = ({
   currentPageIndex: number;
   onPrevious: () => void;
   onNext: () => void;
-  contentRef: RefObject<HTMLDivElement>;
+  contentRef: RefObject<HTMLDivElement | null>;
 }) => {
   const handleClickScreen = useCallback<
     (event: ReactMouseEvent<HTMLDivElement, MouseEvent>) => void
diff --git a/yarn.lock b/yarn.lock
index a33f005..9f2d1c9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1162,11 +1162,6 @@
   resolved "https://registry.yarnpkg.com/@types/parse-json/-/parse-json-4.0.0.tgz#2f8bb441434d163b35fb8ffdccd7138927ffb8c0"
   integrity sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==
 
-"@types/prop-types@*":
-  version "15.7.8"
-  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.8.tgz#805eae6e8f41bd19e88917d2ea200dc992f405d3"
-  integrity sha512-kMpQpfZKSCBqltAJwskgePRaYRFukDkm1oItcAbC3gNELR20XIBcN9VRgg4+m8DKsTfkWeA4m4Imp4DDuWy7FQ==
-
 "@types/qs@*":
   version "6.9.7"
   resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.7.tgz#63bb7d067db107cc1e457c303bc25d511febf6cb"
@@ -1184,12 +1179,11 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react@*", "@types/react@^18.3.12":
-  version "18.3.12"
-  resolved "https://registry.yarnpkg.com/@types/react/-/react-18.3.12.tgz#99419f182ccd69151813b7ee24b792fe08774f60"
-  integrity sha512-D2wOSq/d6Agt28q7rSI3jhU7G6aiuzljDGZ2hTZHIkrTLUI+AF3WMeKkEZ9nN2fkBAlcktT6vcZjDFiIhMYEQw==
+"@types/react@*", "@types/react@^19.1.2":
+  version "19.1.2"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-19.1.2.tgz#11df86f66f188f212c90ecb537327ec68bfd593f"
+  integrity sha512-oxLPMytKchWGbnQM9O7D67uPa9paTNxO7jVoNMXgkkErULBPhPARCfkKL9ytcIJJRGjbsVwW4ugJzyFFvm/Tiw==
   dependencies:
-    "@types/prop-types" "*"
     csstype "^3.0.2"
 
 "@types/semver@^7.5.0":
@@ -4989,7 +4983,7 @@ log-update@^6.1.0:
     strip-ansi "^7.1.0"
     wrap-ansi "^9.0.0"
 
-loose-envify@^1.1.0, loose-envify@^1.4.0:
+loose-envify@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
   integrity sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==
@@ -5638,13 +5632,12 @@ raw-body@^3.0.0:
     iconv-lite "0.6.3"
     unpipe "1.0.0"
 
-react-dom@^18.2.0:
-  version "18.2.0"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-18.2.0.tgz#22aaf38708db2674ed9ada224ca4aa708d821e3d"
-  integrity sha512-6IMTriUmvsjHUjNtEDudZfuDQUoWXVxKHhlEGSk81n4YFS+r/Kl99wXiwlVXtPBtJenozv2P+hxDsw9eA7Xo6g==
+react-dom@^19.1.0:
+  version "19.1.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-19.1.0.tgz#133558deca37fa1d682708df8904b25186793623"
+  integrity sha512-Xs1hdnE+DyKgeHJeJznQmYMIBG3TKIHJJT95Q58nHLSrElKlGQqDTR2HQ9fx5CN/Gk6Vh/kupBTDLU11/nDk/g==
   dependencies:
-    loose-envify "^1.1.0"
-    scheduler "^0.23.0"
+    scheduler "^0.26.0"
 
 react-is@^16.13.1, react-is@^16.7.0:
   version "16.13.1"
@@ -5664,12 +5657,10 @@ react-router@^7.6.1:
     cookie "^1.0.1"
     set-cookie-parser "^2.6.0"
 
-react@^18.3.1:
-  version "18.3.1"
-  resolved "https://registry.yarnpkg.com/react/-/react-18.3.1.tgz#49ab892009c53933625bd16b2533fc754cab2891"
-  integrity sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==
-  dependencies:
-    loose-envify "^1.1.0"
+react@^19.1.0:
+  version "19.1.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-19.1.0.tgz#926864b6c48da7627f004795d6cce50e90793b75"
+  integrity sha512-FS+XFBNvn3GTAWq26joslQgWNoFu08F4kl0J4CgdNKADkdSGXQyTCnKteIAJy96Br6YbpEU1LSzV5dYtjMkMDg==
 
 read-pkg@^3.0.0:
   version "3.0.0"
@@ -5941,12 +5932,10 @@ safe-regex-test@^1.1.0:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
-scheduler@^0.23.0:
-  version "0.23.0"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.23.0.tgz#ba8041afc3d30eb206a487b6b384002e4e61fdfe"
-  integrity sha512-CtuThmgHNg7zIZWAXi3AsyIzA3n4xx7aNyjwC2VJldO2LMVDhFK+63xGqq6CsJH4rTAt6/M+N4GhZiDYPx9eUw==
-  dependencies:
-    loose-envify "^1.1.0"
+scheduler@^0.26.0:
+  version "0.26.0"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.26.0.tgz#4ce8a8c2a2095f13ea11bf9a445be50c555d6337"
+  integrity sha512-NlHwttCI/l5gCPR3D1nNXtWABUmBwvZpEQiD4IXSbIDq8BzLIK/7Ir5gTFSGZDUu37K5cMNp0hFtzO38sC7gWA==
 
 schema-utils@^4.3.0, schema-utils@^4.3.2:
   version "4.3.2"