diff --git a/.github/workflows/_test-units.yml b/.github/workflows/_test-units.yml
index 25815aef..73ea66bc 100644
--- a/.github/workflows/_test-units.yml
+++ b/.github/workflows/_test-units.yml
@@ -33,7 +33,9 @@ jobs:
           cache: "npm"
 
       - name: Set up Poppler on ubuntu
-        run: sudo apt install -y poppler-utils
+        run: |
+            sudo apt-get update
+            sudo apt-get install -y poppler-utils
 
       - name: Install Node.js dependencies
         run: npm ci
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67bf8808..0a7201a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # CHANGELOG
 
+## v4.29.0-rc4 - 2025-07-29
+### Changes
+* :sparkles: add support for page count & mime type + fix syntaxes
+* :recycle: update internal field syntaxes to match other SDKs
+* :recycle: upgrade toString() display for most fields
+* :recycle: fix internals & upgrade tests
+
+
 ## v4.29.0-rc3 - 2025-07-25
 ### Changes
 * :sparkles: add support for URL input source
diff --git a/package-lock.json b/package-lock.json
index 148aabf4..100ea392 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mindee",
-  "version": "4.29.0-rc3",
+  "version": "4.29.0-rc4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mindee",
-      "version": "4.29.0-rc3",
+      "version": "4.29.0-rc4",
       "license": "MIT",
       "dependencies": {
         "@cantoo/pdf-lib": "^2.3.2",
@@ -959,9 +959,9 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "18.19.120",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.19.120.tgz",
-      "integrity": "sha512-WtCGHFXnVI8WHLxDAt5TbnCM4eSE+nI0QN2NJtwzcgMhht2eNz6V9evJrk+lwC8bCY8OWV5Ym8Jz7ZEyGnKnMA==",
+      "version": "18.19.121",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.19.121.tgz",
+      "integrity": "sha512-bHOrbyztmyYIi4f1R0s17QsPs1uyyYnGcXeZoGEd227oZjry0q6XQBQxd82X1I57zEfwO8h9Xo+Kl5gX1d9MwQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3890,9 +3890,9 @@
       }
     },
     "node_modules/typedoc": {
-      "version": "0.28.7",
-      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.28.7.tgz",
-      "integrity": "sha512-lpz0Oxl6aidFkmS90VQDQjk/Qf2iw0IUvFqirdONBdj7jPSN9mGXhy66BcGNDxx5ZMyKKiBVAREvPEzT6Uxipw==",
+      "version": "0.28.8",
+      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.28.8.tgz",
+      "integrity": "sha512-16GfLopc8icHfdvqZDqdGBoS2AieIRP2rpf9mU+MgN+gGLyEQvAO0QgOa6NJ5QNmQi0LFrDY9in4F2fUNKgJKA==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
diff --git a/package.json b/package.json
index 170a0177..6161a398 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mindee",
-  "version": "4.29.0-rc3",
+  "version": "4.29.0-rc4",
   "description": "Mindee Client Library for Node.js",
   "main": "src/index.js",
   "bin": "bin/mindee.js",