diff --git a/package.json b/package.json
index ef0054c4c..af22056a3 100644
--- a/package.json
+++ b/package.json
@@ -170,7 +170,7 @@
     "rotating-file-stream": "2.1.5",
     "sanitize.css": "11.0.0",
     "semver": "5.4.1",
-    "sharp": "0.29.3",
+    "sharp": "0.30.5",
     "split2": "4.0.0",
     "testcheck": "1.0.0-rc.2",
     "typeface-inter": "3.10.0",
diff --git a/ts/groups.ts b/ts/groups.ts
index 054ddbb1f..8b643a751 100644
--- a/ts/groups.ts
+++ b/ts/groups.ts
@@ -4762,7 +4762,7 @@ async function applyGroupChange({
   if (actions.modifyTitle) {
     const { title } = actions.modifyTitle;
     if (title && title.content === 'title') {
-      result.name = title.title;
+      result.name = dropNull(title.title);
     } else {
       log.warn(
         `applyGroupChange/${logId}: Clearing group title due to missing data.`
@@ -4786,8 +4786,9 @@ async function applyGroupChange({
       disappearingMessagesTimer &&
       disappearingMessagesTimer.content === 'disappearingMessagesDuration'
     ) {
-      result.expireTimer =
-        disappearingMessagesTimer.disappearingMessagesDuration;
+      result.expireTimer = dropNull(
+        disappearingMessagesTimer.disappearingMessagesDuration
+      );
     } else {
       log.warn(
         `applyGroupChange/${logId}: Clearing group expireTimer due to missing data.`
@@ -4959,7 +4960,7 @@ async function applyGroupChange({
   if (actions.modifyDescription) {
     const { descriptionBytes } = actions.modifyDescription;
     if (descriptionBytes && descriptionBytes.content === 'descriptionText') {
-      result.description = descriptionBytes.descriptionText;
+      result.description = dropNull(descriptionBytes.descriptionText);
     } else {
       log.warn(
         `applyGroupChange/${logId}: Clearing group description due to missing data.`
@@ -5039,7 +5040,12 @@ export async function decryptGroupAvatar(
     );
   }
 
-  return blob.avatar;
+  const avatar = dropNull(blob.avatar);
+  if (!avatar) {
+    throw new Error('decryptGroupAvatar: Returned blob had no avatar set!');
+  }
+
+  return avatar;
 }
 
 // Ovewriting result.avatar as part of functionality
@@ -5123,7 +5129,7 @@ async function applyGroupState({
   // Note: During decryption, title becomes a GroupAttributeBlob
   const { title } = groupState;
   if (title && title.content === 'title') {
-    result.name = title.title;
+    result.name = dropNull(title.title);
   } else {
     result.name = undefined;
   }
@@ -5138,7 +5144,9 @@ async function applyGroupState({
     disappearingMessagesTimer &&
     disappearingMessagesTimer.content === 'disappearingMessagesDuration'
   ) {
-    result.expireTimer = disappearingMessagesTimer.disappearingMessagesDuration;
+    result.expireTimer = dropNull(
+      disappearingMessagesTimer.disappearingMessagesDuration
+    );
   } else {
     result.expireTimer = undefined;
   }
@@ -5268,7 +5276,7 @@ async function applyGroupState({
   // descriptionBytes
   const { descriptionBytes } = groupState;
   if (descriptionBytes && descriptionBytes.content === 'descriptionText') {
-    result.description = descriptionBytes.descriptionText;
+    result.description = dropNull(descriptionBytes.descriptionText);
   } else {
     result.description = undefined;
   }
@@ -5970,7 +5978,7 @@ export function decryptGroupTitle(
   );
 
   if (blob && blob.content === 'title') {
-    return blob.title;
+    return dropNull(blob.title);
   }
 
   return undefined;
@@ -5990,7 +5998,7 @@ export function decryptGroupDescription(
   );
 
   if (blob && blob.content === 'descriptionText') {
-    return blob.descriptionText;
+    return dropNull(blob.descriptionText);
   }
 
   return undefined;
diff --git a/ts/util/lint/exceptions.json b/ts/util/lint/exceptions.json
index f01f8ab70..d5d1e3715 100644
--- a/ts/util/lint/exceptions.json
+++ b/ts/util/lint/exceptions.json
@@ -5776,12 +5776,6 @@
     "updated": "2018-09-18T19:19:27.699Z",
     "reasonDetail": "Hard-coded string"
   },
-  {
-    "rule": "jQuery-$(",
-    "path": "node_modules/protobufjs/dist/protobuf.min.js",
-    "reasonCategory": "falseMatch",
-    "updated": "2018-09-19T21:59:32.770Z"
-  },
   {
     "rule": "jQuery-load(",
     "path": "node_modules/protobufjs/dist/protobuf.min.js",
@@ -7700,13 +7694,6 @@
     "reasonCategory": "falseMatch",
     "updated": "2020-04-30T22:45:07.878Z"
   },
-  {
-    "rule": "jQuery-$(",
-    "path": "node_modules/sharp/lib/libvips.js",
-    "line": "    const brewPkgConfigPath = spawnSync('which brew >/dev/null 2>&1 && eval $(brew --env) && echo $PKG_CONFIG_LIBDIR', spawnSyncOptions).stdout || '';",
-    "reasonCategory": "falseMatch",
-    "updated": "2019-12-11T01:10:06.091Z"
-  },
   {
     "rule": "jQuery-load(",
     "path": "node_modules/signal-exit/index.js",
diff --git a/yarn.lock b/yarn.lock
index 319d31003..7887493bb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5683,7 +5683,7 @@ color-name@^1.0.0, color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-color-string@1.7.4, color-string@^1.7.4:
+color-string@1.7.4, color-string@^1.9.0:
   version "1.7.4"
   resolved "https://registry.yarnpkg.com/color-string/-/color-string-1.7.4.tgz#79a7bf242610a8aa1b5e2681f3bf6bcfa666245f"
   integrity sha512-nVdUvPVgZMpRQad5dcsCMOSB5BXLljklTiaxS6ehhKxDsAI5sD7k5VmFuBt1y3Rlym8uulc/ANUN/bMWtBu6Sg==
@@ -5696,13 +5696,13 @@ color-support@^1.1.2, color-support@^1.1.3:
   resolved "https://registry.yarnpkg.com/color-support/-/color-support-1.1.3.tgz#93834379a1cc9a0c61f82f52f0d04322251bd5a2"
   integrity sha512-qiBjkpbMLO/HL68y+lh4q0/O1MZFj2RX6X/KmMa3+gJD3z+WwI1ZzDHysvqHGS3mP6mznPckpXmw1nI9cJjyRg==
 
-color@^4.0.1:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/color/-/color-4.0.2.tgz#8bdb639132a37ae8823fd672de5180d0988fca80"
-  integrity sha512-fSu0jW2aKQG2FHlDywqdFPdabJHsUdZ0xabSt3wFZdcgRKtLnUHs19nUtuFuLGVMFhINGgfZEIjbUOsGZXGu7Q==
+color@^4.2.3:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/color/-/color-4.2.3.tgz#d781ecb5e57224ee43ea9627560107c0e0c6463a"
+  integrity sha512-1rXeuUUiGGrykh+CeBdu5Ie7OJwinCgQY0bc7GCRxy5xVHy+moaqkpL/jqQq0MtQOeYcrqEz4abc5f0KtU7W4A==
   dependencies:
     color-convert "^2.0.1"
-    color-string "^1.7.4"
+    color-string "^1.9.0"
 
 colorette@^1.2.1:
   version "1.2.2"
@@ -6508,6 +6508,11 @@ detect-libc@^1.0.2, detect-libc@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
 
+detect-libc@^2.0.0, detect-libc@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-2.0.1.tgz#e1897aa88fa6ad197862937fbc0441ef352ee0cd"
+  integrity sha512-463v3ZeIrcWtdgIg6vI6XUncguvr2TnGl4SzDXinkt9mSLpBJKXT3mW6xT3VQdDN11+WVs29pgvivTc4Lp8v+w==
+
 detect-node@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/detect-node/-/detect-node-2.0.4.tgz#014ee8f8f669c5c58023da64b8179c083a28c46c"
@@ -11566,10 +11571,10 @@ node-abi@^3.3.0:
   dependencies:
     semver "^7.3.5"
 
-node-addon-api@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-4.2.0.tgz#117cbb5a959dff0992e1c586ae0393573e4d2a87"
-  integrity sha512-eazsqzwG2lskuzBqCGPi7Ac2UgOoMz8JVOXVhTvvPDYhthvNpefx8jWD8Np7Gv+2Sz0FlPWZk0nJV0z598Wn8Q==
+node-addon-api@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-5.0.0.tgz#7d7e6f9ef89043befdb20c1989c905ebde18c501"
+  integrity sha512-CvkDw2OEnme7ybCykJpVcKH+uAOLV2qLqiyla128dN9TkEWfrYmxG6C2boDe5KcNQqZF3orkqzGgOMvZ/JNekA==
 
 node-dir@^0.1.10:
   version "0.1.17"
@@ -12834,12 +12839,12 @@ prebuild-install@^6.0.0:
     tar-fs "^2.0.0"
     tunnel-agent "^0.6.0"
 
-prebuild-install@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-7.0.0.tgz#3c5ce3902f1cb9d6de5ae94ca53575e4af0c1574"
-  integrity sha512-IvSenf33K7JcgddNz2D5w521EgO+4aMMjFt73Uk9FRzQ7P+QZPKrp7qPsDydsSwjGt3T5xRNnM1bj1zMTD5fTA==
+prebuild-install@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-7.1.0.tgz#991b6ac16c81591ba40a6d5de93fb33673ac1370"
+  integrity sha512-CNcMgI1xBypOyGqjp3wOc8AAo1nMhZS3Cwd3iHIxOdAUbb+YxdNuM4Z5iIrZ8RLvOsf3F3bl7b7xGq6DjQoNYA==
   dependencies:
-    detect-libc "^1.0.3"
+    detect-libc "^2.0.0"
     expand-template "^2.0.3"
     github-from-package "0.0.0"
     minimist "^1.2.3"
@@ -14378,14 +14383,7 @@ semver@^6.0.0, semver@^6.1.1, semver@^6.1.2, semver@^6.2.0, semver@^6.3.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
-semver@^7.2.1, semver@^7.3.2, semver@^7.3.4, semver@^7.3.5:
-  version "7.3.5"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
-  integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==
-  dependencies:
-    lru-cache "^6.0.0"
-
-semver@^7.3.7:
+semver@^7.2.1, semver@^7.3.2, semver@^7.3.4, semver@^7.3.5, semver@^7.3.7:
   version "7.3.7"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.7.tgz#12c5b649afdbf9049707796e22a4028814ce523f"
   integrity sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==
@@ -14532,17 +14530,17 @@ shallowequal@^1.1.0:
   resolved "https://registry.yarnpkg.com/shallowequal/-/shallowequal-1.1.0.tgz#188d521de95b9087404fd4dcb68b13df0ae4e7f8"
   integrity sha512-y0m1JoUZSlPAjXVtPPW70aZWfIL/dSP7AFkRnniLCrK/8MDKog3TySTBmckD+RObVxH0v4Tox67+F14PdED2oQ==
 
-sharp@0.29.3:
-  version "0.29.3"
-  resolved "https://registry.yarnpkg.com/sharp/-/sharp-0.29.3.tgz#0da183d626094c974516a48fab9b3e4ba92eb5c2"
-  integrity sha512-fKWUuOw77E4nhpyzCCJR1ayrttHoFHBT2U/kR/qEMRhvPEcluG4BKj324+SCO1e84+knXHwhJ1HHJGnUt4ElGA==
+sharp@0.30.5:
+  version "0.30.5"
+  resolved "https://registry.yarnpkg.com/sharp/-/sharp-0.30.5.tgz#81c36fd05624978384ac6bd2744d23f9c82edefd"
+  integrity sha512-0T28KxqY4DzUMLSAp1/IhGVeHpPIQyp1xt7esmuXCAfyi/+6tYMUeRhQok+E/+E52Yk5yFjacXp90cQOkmkl4w==
   dependencies:
-    color "^4.0.1"
-    detect-libc "^1.0.3"
-    node-addon-api "^4.2.0"
-    prebuild-install "^7.0.0"
-    semver "^7.3.5"
-    simple-get "^4.0.0"
+    color "^4.2.3"
+    detect-libc "^2.0.1"
+    node-addon-api "^5.0.0"
+    prebuild-install "^7.1.0"
+    semver "^7.3.7"
+    simple-get "^4.0.1"
     tar-fs "^2.1.1"
     tunnel-agent "^0.6.0"
 
@@ -14608,10 +14606,10 @@ simple-get@^3.0.3:
     once "^1.3.1"
     simple-concat "^1.0.0"
 
-simple-get@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/simple-get/-/simple-get-4.0.0.tgz#73fa628278d21de83dadd5512d2cc1f4872bd675"
-  integrity sha512-ZalZGexYr3TA0SwySsr5HlgOOinS4Jsa8YB2GJ6lUNAazyAu4KG/VmzMTwAt2YVXzzVj8QmefmAonZIK2BSGcQ==
+simple-get@^4.0.0, simple-get@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/simple-get/-/simple-get-4.0.1.tgz#4a39db549287c979d352112fa03fd99fd6bc3543"
+  integrity sha512-brv7p5WgH0jmQJr1ZDDfKDOSeWWg+OVypG99A/5vYGPqJ6pxiaHLy8nxtFjBA7oMa01ebA9gfh1uMCFqOuXxvA==
   dependencies:
     decompress-response "^6.0.0"
     once "^1.3.1"