diff --git a/package-lock.json b/package-lock.json
index 6666156ef7450950b5647ac77674abaa9753304b..1f4a763ea83e55374672a24128f356662629a463 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1296,17 +1296,6 @@
         }
       }
     },
-    "clone-deep": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/clone-deep/-/clone-deep-4.0.1.tgz",
-      "integrity": "sha512-neHB9xuzh/wk0dIHweyAXv2aPGZIVk3pLMe+/RNzINf17fe0OG96QroktYAUm7SM1PBnzTabaLboqqxDyMU+SQ==",
-      "dev": true,
-      "requires": {
-        "is-plain-object": "^2.0.4",
-        "kind-of": "^6.0.2",
-        "shallow-clone": "^3.0.0"
-      }
-    },
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
@@ -3270,6 +3259,12 @@
       "integrity": "sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==",
       "dev": true
     },
+    "klona": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/klona/-/klona-1.1.2.tgz",
+      "integrity": "sha512-xf88rTeHiXk+XE2Vhi6yj8Wm3gMZrygGdKjJqN8HkV+PwF/t50/LdAKHoHpPcxFAlmQszTZ1CugrK25S7qDRLA==",
+      "dev": true
+    },
     "load-json-file": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
@@ -4731,22 +4726,54 @@
       }
     },
     "sass-loader": {
-      "version": "7.3.1",
-      "resolved": "https://registry.npmjs.org/sass-loader/-/sass-loader-7.3.1.tgz",
-      "integrity": "sha512-tuU7+zm0pTCynKYHpdqaPpe+MMTQ76I9TPZ7i4/5dZsigE350shQWe5EZNl5dBidM49TPET75tNqRbcsUZWeNA==",
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/sass-loader/-/sass-loader-9.0.3.tgz",
+      "integrity": "sha512-fOwsP98ac1VMme+V3+o0HaaMHp8Q/C9P+MUazLFVi3Jl7ORGHQXL1XeRZt3zLSGZQQPC8xE42Y2WptItvGjDQg==",
       "dev": true,
       "requires": {
-        "clone-deep": "^4.0.1",
-        "loader-utils": "^1.0.1",
-        "neo-async": "^2.5.0",
-        "pify": "^4.0.1",
-        "semver": "^6.3.0"
+        "klona": "^1.1.2",
+        "loader-utils": "^2.0.0",
+        "neo-async": "^2.6.2",
+        "schema-utils": "^2.7.0",
+        "semver": "^7.3.2"
       },
       "dependencies": {
+        "emojis-list": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/emojis-list/-/emojis-list-3.0.0.tgz",
+          "integrity": "sha512-/kyM18EfinwXZbno9FyUGeFh87KC8HRQBQGildHZbEuRyWFOmv1U10o9BBp8XVZDVNNuQKyIGIu5ZYAAXJ0V2Q==",
+          "dev": true
+        },
+        "json5": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/json5/-/json5-2.1.3.tgz",
+          "integrity": "sha512-KXPvOm8K9IJKFM0bmdn8QXh7udDh1g/giieX0NLCaMnb4hEiVFqnop2ImTXCc5e0/oHz3LTqmHGtExn5hfMkOA==",
+          "dev": true,
+          "requires": {
+            "minimist": "^1.2.5"
+          }
+        },
+        "loader-utils": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.0.tgz",
+          "integrity": "sha512-rP4F0h2RaWSvPEkD7BLDFQnvSf+nK+wr3ESUjNTyAGobqrijmW92zc+SO6d4p4B1wh7+B/Jg1mkQe5NYUEHtHQ==",
+          "dev": true,
+          "requires": {
+            "big.js": "^5.2.2",
+            "emojis-list": "^3.0.0",
+            "json5": "^2.1.2"
+          }
+        },
+        "neo-async": {
+          "version": "2.6.2",
+          "resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.2.tgz",
+          "integrity": "sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==",
+          "dev": true
+        },
         "semver": {
-          "version": "6.3.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
-          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "version": "7.3.2",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
+          "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==",
           "dev": true
         }
       }
@@ -4884,15 +4911,6 @@
         "safe-buffer": "^5.0.1"
       }
     },
-    "shallow-clone": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/shallow-clone/-/shallow-clone-3.0.1.tgz",
-      "integrity": "sha512-/6KqX+GVUdqPuPPd2LxDDxzX6CAbjJehAAOKlNpqqUpAqPM6HeL8f+o3a+JsyGjn2lv0WY8UsTgUJjU9Ok55NA==",
-      "dev": true,
-      "requires": {
-        "kind-of": "^6.0.2"
-      }
-    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
diff --git a/package.json b/package.json
index 52ef0e4d5a36957586215f15aac8f5f8b5ff953d..7554e92cb48767c3fdcb8a9dff008ffc3bb7a5ac 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "expose-loader": "^0.7.5",
     "mini-css-extract-plugin": "^0.10.0",
     "node-sass": "^4.14.1",
-    "sass-loader": "^7.3.1",
+    "sass-loader": "^9.0.3",
     "style-loader": "^1.0.1",
     "webpack": "^4.44.1",
     "webpack-cli": "^3.3.12"
diff --git a/webpack.config.js b/webpack.config.js
index 877261a897a4526691626cd1e413bf6376bc5a18..601e096105c3acc48692b856399aa5baa6b2780c 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -49,8 +49,15 @@ module.exports = environment => {
                         {
                             loader: 'sass-loader',
                             options: {
+<<<<<<< HEAD
                                 indentedSyntax: false,
                                 data: "$primaryBackground: " + primaryBackground + '; ' +
+=======
+                                sassOptions: {
+                                    indentedSyntax: false
+                                },
+                                additionalData: "$primaryBackground: " + primaryBackground + '; ' +
+>>>>>>> Upgrade sass-loader; Closes #1235
                                       "$transitionBackground: " + transitionBackground + "; " +
                                       "$secondaryBackground: " + secondaryBackground + ";"
                             }