diff --git a/server/backend/package-lock.json b/server/backend/package-lock.json
index 6090598..9f886f7 100644
--- a/server/backend/package-lock.json
+++ b/server/backend/package-lock.json
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@@ -200,22 +233,35 @@
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-        "normalize-path": "^2.0.0",
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+          "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
+      }
+    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@@ -2546,11 +2524,6 @@
         "extsprintf": "^1.2.0"
       }
     },
-    "walkdir": {
-      "version": "0.0.11",
-      "resolved": "https://registry.npmjs.org/walkdir/-/walkdir-0.0.11.tgz",
-      "integrity": "sha1-oW0CXrkxvQO1LzCMrtD0D86+lTI="
-    },
     "with-callback": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/with-callback/-/with-callback-1.0.2.tgz",
@@ -2559,7 +2532,7 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
     },
     "ws": {
       "version": "6.1.2",
@@ -2579,11 +2552,6 @@
       "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-2.0.0.tgz",
       "integrity": "sha1-UqY+VsoLhKfzpfPWGHLxJq16WUM="
     },
-    "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
-    },
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
@@ -2595,14 +2563,13 @@
       "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
     },
     "zip-stream": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-1.2.0.tgz",
-      "integrity": "sha1-qLxF9MG0lpnGuQGYuqyqzbzUugQ=",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-2.1.3.tgz",
+      "integrity": "sha512-EkXc2JGcKhO5N5aZ7TmuNo45budRaFGHOmz24wtJR7znbNqDPmdZtUauKX6et8KAVseAMBOyWJqEpXcHTBsh7Q==",
       "requires": {
-        "archiver-utils": "^1.3.0",
-        "compress-commons": "^1.2.0",
-        "lodash": "^4.8.0",
-        "readable-stream": "^2.0.0"
+        "archiver-utils": "^2.1.0",
+        "compress-commons": "^2.1.1",
+        "readable-stream": "^3.4.0"
       }
     }
   }
diff --git a/server/backend/package.json b/server/backend/package.json
index 86af0f8..72643aa 100644
--- a/server/backend/package.json
+++ b/server/backend/package.json
@@ -10,7 +10,7 @@
     "cookie-parser": "~1.4.3",
     "cors": "^2.8.5",
     "debug": "~2.6.9",
-    "exceljs": "^1.6.3",
+    "exceljs": "^1.15.0",
     "express": "~4.16.0",
     "jsonwebtoken": "^8.4.0",
     "mongoose": "^5.4.2",