diff --git a/package-lock.json b/package-lock.json
index 4e13e2c..6eedc7c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,7 +24,7 @@
         "angulartics2": "^9.1.0",
         "express": "^4.15.2",
         "ngx-markdown": "^9.1.1",
-        "rxjs": "~6.5.4",
+        "rxjs": "~7.5.5",
         "tslib": "^2.0.0",
         "zone.js": "~0.11.4"
       },
@@ -4461,6 +4461,24 @@
         "nice-napi": "^1.0.2"
       }
     },
+    "node_modules/@nguniversal/builders/node_modules/rxjs": {
+      "version": "6.6.7",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
+      "integrity": "sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==",
+      "dev": true,
+      "dependencies": {
+        "tslib": "^1.9.0"
+      },
+      "engines": {
+        "npm": ">=2.0.0"
+      }
+    },
+    "node_modules/@nguniversal/builders/node_modules/rxjs/node_modules/tslib": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==",
+      "dev": true
+    },
     "node_modules/@nguniversal/builders/node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -10116,9 +10134,9 @@
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     "node_modules/engine.io": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-6.2.0.tgz",
-      "integrity": "sha512-4KzwW3F3bk+KlzSOY57fj/Jx6LyRQ1nbcyIadehl+AnXjKT7gDO0ORdRi/84ixvMKTym6ZKuxvbzN62HDDU1Lg==",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-6.2.1.tgz",
+      "integrity": "sha512-ECceEFcAaNRybd3lsGQKas3ZlMVjN3cyWwMP25D2i0zWfyiytVbTpRPa34qrr+FHddtpBVOmq4H/DCv1O0lZRA==",
       "dev": true,
       "dependencies": {
         "@types/cookie": "^0.4.1",
@@ -15602,15 +15620,6 @@
         "node": ">=10"
       }
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-    "node_modules/ng-packagr/node_modules/rxjs": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-7.5.5.tgz",
-      "integrity": "sha512-sy+H0pQofO95VDmFLzyaw9xNJU4KTRSwQIGM6+iG3SypAtCiLDzpeG8sJrNCWn2Up9km+KhkvTdbkrdy+yzZdw==",
-      "dev": true,
-      "dependencies": {
-        "tslib": "^2.1.0"
-      }
-    },
     "node_modules/ngx-markdown": {
       "version": "9.1.1",
       "resolved": "https://registry.npmjs.org/ngx-markdown/-/ngx-markdown-9.1.1.tgz",
@@ -19617,21 +19626,13 @@
       "dev": true
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-      "version": "6.5.5",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.5.tgz",
-      "integrity": "sha512-WfQI+1gohdf0Dai/Bbmk5L5ItH5tYqm3ki2c5GdWhKjalzjg93N3avFjVStyZZz+A2Em+ZxKH5bNghw9UeylGQ==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-7.5.7.tgz",
+      "integrity": "sha512-z9MzKh/UcOqB3i20H6rtrlaE/CgjLOvheWK/9ILrbhROGTweAi1BaFsTT9FbwZi5Trr1qNRs+MXkhmR06awzQA==",
       "dependencies": {
-        "tslib": "^1.9.0"
-      },
-      "engines": {
-        "npm": ">=2.0.0"
+        "tslib": "^2.1.0"
       }
     },
-    "node_modules/rxjs/node_modules/tslib": {
-      "version": "1.14.1",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
-      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
-    },
     "node_modules/safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -26137,6 +26138,23 @@
             "nice-napi": "^1.0.2"
           }
         },
+        "rxjs": {
+          "version": "6.6.7",
+          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
+          "integrity": "sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==",
+          "dev": true,
+          "requires": {
+            "tslib": "^1.9.0"
+          },
+          "dependencies": {
+            "tslib": {
+              "version": "1.14.1",
+              "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+              "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==",
+              "dev": true
+            }
+          }
+        },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -30626,9 +30644,9 @@
       }
     },
     "engine.io": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-6.2.0.tgz",
-      "integrity": "sha512-4KzwW3F3bk+KlzSOY57fj/Jx6LyRQ1nbcyIadehl+AnXjKT7gDO0ORdRi/84ixvMKTym6ZKuxvbzN62HDDU1Lg==",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-6.2.1.tgz",
+      "integrity": "sha512-ECceEFcAaNRybd3lsGQKas3ZlMVjN3cyWwMP25D2i0zWfyiytVbTpRPa34qrr+FHddtpBVOmq4H/DCv1O0lZRA==",
       "dev": true,
       "requires": {
         "@types/cookie": "^0.4.1",
@@ -34712,15 +34730,6 @@
           "requires": {
             "brace-expansion": "^2.0.1"
           }
-        },
-        "rxjs": {
-          "version": "7.5.5",
-          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-7.5.5.tgz",
-          "integrity": "sha512-sy+H0pQofO95VDmFLzyaw9xNJU4KTRSwQIGM6+iG3SypAtCiLDzpeG8sJrNCWn2Up9km+KhkvTdbkrdy+yzZdw==",
-          "dev": true,
-          "requires": {
-            "tslib": "^2.1.0"
-          }
         }
       }
     },
@@ -37675,18 +37684,11 @@
       "dev": true
     },
     "rxjs": {
-      "version": "6.5.5",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.5.tgz",
-      "integrity": "sha512-WfQI+1gohdf0Dai/Bbmk5L5ItH5tYqm3ki2c5GdWhKjalzjg93N3avFjVStyZZz+A2Em+ZxKH5bNghw9UeylGQ==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-7.5.7.tgz",
+      "integrity": "sha512-z9MzKh/UcOqB3i20H6rtrlaE/CgjLOvheWK/9ILrbhROGTweAi1BaFsTT9FbwZi5Trr1qNRs+MXkhmR06awzQA==",
       "requires": {
-        "tslib": "^1.9.0"
-      },
-      "dependencies": {
-        "tslib": {
-          "version": "1.14.1",
-          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
-          "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
-        }
+        "tslib": "^2.1.0"
       }
     },
     "safe-buffer": {