diff --git a/index.html b/index.html
index 832e496..88c57dd 100644
--- a/index.html
+++ b/index.html
@@ -100,7 +100,7 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
 </div>
 
 <form style="display: none; height: 0; width: 0; margin: 0; padding: 0;">
-    <input type="file" id="open-file-input">
+    <input type="file" id="open-file-input" accept=".pdf"/>
 </form>
 
 <div id="svgtrimbox"></div>
diff --git a/package-lock.json b/package-lock.json
index fece215..6d094e4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -136,16 +136,6 @@
                 "html2canvas": "^1.0.0-rc.5"
             }
         },
-        "konva": {
-            "version": "8.1.0",
-            "resolved": "https://registry.npmjs.org/konva/-/konva-8.1.0.tgz",
-            "integrity": "sha512-HkS5jB4oZlj+koSBmKWWWBOoaivnKDsEAZUkk+6xlOT+ryj5HFXkTfBZZKBS+IA0WRz3vDpko0y3LFAzuc86kA=="
-        },
-        "load-img": {
-            "version": "1.0.0",
-            "resolved": "https://registry.npmjs.org/load-img/-/load-img-1.0.0.tgz",
-            "integrity": "sha1-CVN0SYk8MqhwkHRkVWbExfqprCY="
-        },
         "pako": {
             "version": "1.0.11",
             "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
@@ -211,14 +201,6 @@
             "integrity": "sha512-TAAvLNSE3fEhyl/Da19JWfMAdhSXTYeviXsLSoDT1UM76ADj5ndwAPX1FKQEgB/gFMPavOy6tOqfalXKUiXrow==",
             "optional": true
         },
-        "svg-to-image": {
-            "version": "1.1.3",
-            "resolved": "https://registry.npmjs.org/svg-to-image/-/svg-to-image-1.1.3.tgz",
-            "integrity": "sha1-1v9NiDyo9+P3krQrIyixXL4vsPM=",
-            "requires": {
-                "load-img": "^1.0.0"
-            }
-        },
         "tslib": {
             "version": "1.14.1",
             "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
diff --git a/package.json b/package.json
index 0b025a9..f27631a 100644
--- a/package.json
+++ b/package.json
@@ -16,10 +16,8 @@
         "bootstrap": "^5.0.2",
         "jquery": "^3.6.0",
         "jspdf": "^2.3.1",
-        "konva": "^8.1.0",
         "pdf-lib": "^1.16.0",
         "pdfjs-dist": "^2.8.335",
-        "signature_pad": "^3.0.0-beta.4",
-        "svg-to-image": "^1.1.3"
+        "signature_pad": "^3.0.0-beta.4"
     }
 }