diff --git a/apps/desktop/package.json b/apps/desktop/package.json
index e7685d6f0..647047e31 100644
--- a/apps/desktop/package.json
+++ b/apps/desktop/package.json
@@ -20,7 +20,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^1.24.0",
-    "pdfjs-dist": "6.1.200",
+    "pdfjs-dist": "^6.2.108",
     "react": "^19.2.4",
     "react-dom": "^19.2.7",
     "sonner": "^2.0.7",
diff --git a/apps/desktop/src/features/score/ScoreViewer.test.tsx b/apps/desktop/src/features/score/ScoreViewer.test.tsx
index 3ac2dd605..71985dd7f 100644
--- a/apps/desktop/src/features/score/ScoreViewer.test.tsx
+++ b/apps/desktop/src/features/score/ScoreViewer.test.tsx
@@ -16,7 +16,9 @@ vi.mock("../../i18n", () => ({
       scoreViewerFailedTitle: "Could not display the score",
       scoreViewerRetry: "Retry",
       scoreViewerPrevPage: "Previous page",
+      scoreViewerPrevPageDisabled: "Previous page (Unavailable)",
       scoreViewerNextPage: "Next page",
+      scoreViewerNextPageDisabled: "Next page (Unavailable)",
       scoreViewerPageIndicator: "Page {current} of {total}",
       scoreViewerZoomIn: "Zoom in",
       scoreViewerZoomOut: "Zoom out",
@@ -120,8 +122,8 @@ describe("ScoreViewer", () => {
       expect(page.render).toHaveBeenCalled();
     });
     expect(page.getViewport).toHaveBeenCalledWith({ scale: 1 });
-    expect(screen.getByRole("button", { name: "Previous page" })).toBeDisabled();
-    expect(screen.getByRole("button", { name: "Next page" })).toBeEnabled();
+    expect(screen.getByRole("button", { name: "Previous page" })).toHaveAttribute("aria-disabled", "true");
+    expect(screen.getByRole("button", { name: "Next page" })).not.toHaveAttribute("aria-disabled", "true");
   });
 
   it("shows the file name when provided", async () => {
@@ -174,14 +176,22 @@ describe("ScoreViewer", () => {
     expect(await screen.findByText("Page 1 of 3")).toBeInTheDocument();
     const previousButton = screen.getByRole("button", { name: "Previous page" });
     const nextButton = screen.getByRole("button", { name: "Next page" });
-    expect(previousButton).toBeDisabled();
+    expect(previousButton).toHaveAttribute("aria-disabled", "true");
+    const preventDefaultSpyPrev = vi.spyOn(Event.prototype, "preventDefault");
+    fireEvent.click(previousButton);
+    expect(preventDefaultSpyPrev).toHaveBeenCalled();
+    preventDefaultSpyPrev.mockRestore();
 
     fireEvent.click(nextButton);
     expect(screen.getByText("Page 2 of 3")).toBeInTheDocument();
 
     fireEvent.click(nextButton);
     expect(screen.getByText("Page 3 of 3")).toBeInTheDocument();
-    expect(nextButton).toBeDisabled();
+    expect(nextButton).toHaveAttribute("aria-disabled", "true");
+    const preventDefaultSpyNext = vi.spyOn(Event.prototype, "preventDefault");
+    fireEvent.click(nextButton);
+    expect(preventDefaultSpyNext).toHaveBeenCalled();
+    preventDefaultSpyNext.mockRestore();
 
     await waitFor(() => {
       expect(doc.getPage).toHaveBeenCalledWith(3);
diff --git a/apps/desktop/src/features/score/ScoreViewer.tsx b/apps/desktop/src/features/score/ScoreViewer.tsx
index 82692469e..9ae55363b 100644
--- a/apps/desktop/src/features/score/ScoreViewer.tsx
+++ b/apps/desktop/src/features/score/ScoreViewer.tsx
@@ -292,8 +292,9 @@ export function ScoreViewer({ data, fileName, onStatusChange }: ScoreViewerProps
             size="icon-lg"
             className="size-14"
             aria-label={t("scoreViewerPrevPage")}
-            disabled={pageNumber <= 1}
-            onClick={goToPreviousPage}
+            aria-disabled={pageNumber <= 1 ? "true" : undefined}
+            onClick={pageNumber <= 1 ? (e) => e.preventDefault() : goToPreviousPage}
+            title={pageNumber <= 1 ? t("scoreViewerPrevPageDisabled") : t("scoreViewerPrevPage")}
           >
             <ChevronLeft className="size-6" aria-hidden="true" />
           </Button>
@@ -305,8 +306,9 @@ export function ScoreViewer({ data, fileName, onStatusChange }: ScoreViewerProps
             size="icon-lg"
             className="size-14"
             aria-label={t("scoreViewerNextPage")}
-            disabled={pageNumber >= pageCount}
-            onClick={goToNextPage}
+            aria-disabled={pageNumber >= pageCount ? "true" : undefined}
+            onClick={pageNumber >= pageCount ? (e) => e.preventDefault() : goToNextPage}
+            title={pageNumber >= pageCount ? t("scoreViewerNextPageDisabled") : t("scoreViewerNextPage")}
           >
             <ChevronRight className="size-6" aria-hidden="true" />
           </Button>
diff --git a/apps/desktop/src/locales/en/common.json b/apps/desktop/src/locales/en/common.json
index 39f716d50..fbec7802b 100644
--- a/apps/desktop/src/locales/en/common.json
+++ b/apps/desktop/src/locales/en/common.json
@@ -148,5 +148,7 @@
   "practiceProgressRegionLabel": "Practice Progress",
   "practiceProgressLabel": "Practice Progress",
   "decreasePracticeProgressLabel": "Decrease progress",
-  "increasePracticeProgressLabel": "Increase progress"
+  "increasePracticeProgressLabel": "Increase progress",
+  "scoreViewerPrevPageDisabled": "Previous page (Unavailable)",
+  "scoreViewerNextPageDisabled": "Next page (Unavailable)"
 }
diff --git a/apps/desktop/src/locales/ko/common.json b/apps/desktop/src/locales/ko/common.json
index 371884abb..05058ef44 100644
--- a/apps/desktop/src/locales/ko/common.json
+++ b/apps/desktop/src/locales/ko/common.json
@@ -148,5 +148,7 @@
   "practiceProgressRegionLabel": "연습 진척도",
   "practiceProgressLabel": "연습 진척도",
   "decreasePracticeProgressLabel": "진척도 감소",
-  "increasePracticeProgressLabel": "진척도 증가"
+  "increasePracticeProgressLabel": "진척도 증가",
+  "scoreViewerPrevPageDisabled": "이전 페이지 (사용 불가)",
+  "scoreViewerNextPageDisabled": "다음 페이지 (사용 불가)"
 }
diff --git a/package-lock.json b/package-lock.json
index cf1c991c1..3c8af1eb8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,7 @@
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "lucide-react": "^1.24.0",
-        "pdfjs-dist": "6.1.200",
+        "pdfjs-dist": "^6.2.108",
         "react": "^19.2.4",
         "react-dom": "^19.2.7",
         "sonner": "^2.0.7",
@@ -955,7 +955,6 @@
       "os": [
         "aix"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -973,7 +972,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -991,7 +989,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1009,7 +1006,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1027,7 +1023,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1045,7 +1040,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1063,7 +1057,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1081,7 +1074,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1099,7 +1091,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1117,7 +1108,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1135,7 +1125,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1153,7 +1142,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1171,7 +1159,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1189,7 +1176,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1207,7 +1193,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1225,7 +1210,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1243,7 +1227,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1261,7 +1244,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1279,7 +1261,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1297,7 +1278,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1315,7 +1295,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1333,7 +1312,6 @@
       "os": [
         "openharmony"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1351,7 +1329,6 @@
       "os": [
         "sunos"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1369,7 +1346,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1387,7 +1363,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1405,7 +1380,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -6075,9 +6049,9 @@
       "license": "MIT"
     },
     "node_modules/nanoid": {
-      "version": "3.3.16",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.16.tgz",
-      "integrity": "sha512-bzlKTyNJ7+LdGIIwy8ijFpIqEQIvafahV7eYykJ8Cvh42EdJeODoJ6gUJXpQJvej1BddH8OqTXZNE/KfbWAu8Q==",
+      "version": "3.3.18",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.18.tgz",
+      "integrity": "sha512-DTg4MJbGMWkfi6VZFdNt2/caMbQy4Ou+Op/hJQvGEWcnVfoA1QA+xzRKAzw9jD6+GVOOeYr/mIcuDSdug6F6+w==",
       "dev": true,
       "funding": [
         {
@@ -6368,9 +6342,9 @@
       }
     },
     "node_modules/pdfjs-dist": {
-      "version": "6.1.200",
-      "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-6.1.200.tgz",
-      "integrity": "sha512-o8MolyzirkkLrcdsae/HEOiIcXWI7DS5zGpvqW8xTC2YUsW30rltFw2bDGvw/fskUdEMrQm2br68jzDS5BH2vw==",
+      "version": "6.2.108",
+      "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-6.2.108.tgz",
+      "integrity": "sha512-YxFb+SQcodN2rnX9Tn3dHYlqfb7NjlzzfONPpJd+AKoKtUjEdevTfbC07d5TcczzOK6261auRkP/M8OBHs9vFQ==",
       "license": "Apache-2.0",
       "engines": {
         "node": ">=22.13.0 || >=24"
@@ -7179,9 +7153,9 @@
       }
     },
     "node_modules/undici": {
-      "version": "7.28.0",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-7.28.0.tgz",
-      "integrity": "sha512-cRZYrTDwWznlnRiPjggAGxZXanty6M8RV1ff8Wm4LWXBp7/IG8v5DnOm74DtUBp9OONpK75YlPnIjQqX0dBDtA==",
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.29.0.tgz",
+      "integrity": "sha512-IDxfleLmmbSskfWSUATiN1nfn2rDuvnMOqb5CWR92iIfojA0Ud+ulOAAEQ57LPr9rWmsreUyf5lwyao+7GNNVw==",
       "dev": true,
       "license": "MIT",
       "engines": {
diff --git a/package.json b/package.json
index a71236ed0..56440a919 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
   },
   "overrides": {
     "brace-expansion": "5.0.9",
-    "postcss": "8.5.25"
+    "postcss": "8.5.25",
+    "pdfjs-dist": "6.2.108"
   }
 }