diff --git a/Rnwood.Smtp4dev/ClientApp/package-lock.json b/Rnwood.Smtp4dev/ClientApp/package-lock.json
index 9b9ee6d80..ded091494 100644
--- a/Rnwood.Smtp4dev/ClientApp/package-lock.json
+++ b/Rnwood.Smtp4dev/ClientApp/package-lock.json
@@ -9100,6 +9100,12 @@
       "integrity": "sha512-BMpfD7PpiETpBl/A6S498BaIJ6Y/ABT93ETbby2fP00v4EbvPBXWEoaR1UBPKs3iR53pJY7EtZk5KACI57i1Uw==",
       "dev": true
     },
+    "immutable": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.0.0.tgz",
+      "integrity": "sha512-zIE9hX70qew5qTUjSS7wi1iwj/l7+m54KWU247nhM3v806UdGj1yDndXj+IOYxxtW9zyLI+xqFNZjTuDaLUqFw==",
+      "dev": true
+    },
     "import-cwd": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/import-cwd/-/import-cwd-2.1.0.tgz",
@@ -10146,9 +10152,9 @@
       "dev": true
     },
     "memfs": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/memfs/-/memfs-3.4.0.tgz",
-      "integrity": "sha512-o/RfP0J1d03YwsAxyHxAYs2kyJp55AFkMazlFAZFR2I2IXkxiUTXRabJ6RmNNCQ83LAD2jy52Khj0m3OffpNdA==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/memfs/-/memfs-3.4.1.tgz",
+      "integrity": "sha512-1c9VPVvW5P7I85c35zAdEr1TD5+F11IToIHIlrVIcflfnzPkJa0ZoYEoEdYDP8KgPFoSZ/opDrUsAoZWym3mtw==",
       "dev": true,
       "requires": {
         "fs-monkey": "1.0.3"
@@ -12577,12 +12583,14 @@
       "dev": true
     },
     "sass": {
-      "version": "1.43.5",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.43.5.tgz",
-      "integrity": "sha512-WuNm+eAryMgQluL7Mbq9M4EruyGGMyal7Lu58FfnRMVWxgUzIvI7aSn60iNt3kn5yZBMR7G84fAGDcwqOF5JOg==",
+      "version": "1.49.11",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.49.11.tgz",
+      "integrity": "sha512-wvS/geXgHUGs6A/4ud5BFIWKO1nKd7wYIGimDk4q4GFkJicILActpv9ueMT4eRGSsp1BdKHuw1WwAHXbhsJELQ==",
       "dev": true,
       "requires": {
-        "chokidar": ">=3.0.0 <4.0.0"
+        "chokidar": ">=3.0.0 <4.0.0",
+        "immutable": "^4.0.0",
+        "source-map-js": ">=0.6.2 <2.0.0"
       },
       "dependencies": {
         "anymatch": {
@@ -12611,9 +12619,9 @@
           }
         },
         "chokidar": {
-          "version": "3.5.2",
-          "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.2.tgz",
-          "integrity": "sha512-ekGhOnNVPgT77r4K/U3GDhu+FQ2S8TnK/s2KbIGXi0SZWuwkZ2QNyfWdZW+TVfn84DpEP7rLeCt2UI6bJ8GwbQ==",
+          "version": "3.5.3",
+          "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
+          "integrity": "sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==",
           "dev": true,
           "requires": {
             "anymatch": "~3.1.2",
@@ -13270,6 +13278,12 @@
       "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
       "dev": true
     },
+    "source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
+      "dev": true
+    },
     "source-map-resolve": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.3.tgz",
diff --git a/Rnwood.Smtp4dev/ClientApp/package.json b/Rnwood.Smtp4dev/ClientApp/package.json
index 367ffabf1..dd19fbcd0 100644
--- a/Rnwood.Smtp4dev/ClientApp/package.json
+++ b/Rnwood.Smtp4dev/ClientApp/package.json
@@ -34,7 +34,7 @@
     "locale-index-of": "^2.0.0",
     "moment": "^2.29.1",
     "patch-package": "^6.4.7",
-    "sass": "^1.43.5",
+    "sass": "^1.49.11",
     "sass-loader": "^10.1.0",
     "srcdoc-polyfill": "^1.0.0",
     "ts-debounce": "^3.0.0",