diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index c1de3e87..ffbe144d 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -9,15 +9,18 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   check:
     runs-on: macos-latest
     env:
       MINT_PATH: ${{ github.workspace }}/mint
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
-    - uses: actions/setup-python@v3
+    - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
       with:
         python-version: '3.10'
 
diff --git a/.github/workflows/datatransport.yml b/.github/workflows/datatransport.yml
index 220c25bd..d704680d 100644
--- a/.github/workflows/datatransport.yml
+++ b/.github/workflows/datatransport.yml
@@ -14,6 +14,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   pod_lib_lint:
     runs-on: macos-latest
@@ -21,8 +24,8 @@ jobs:
       matrix:
         target: [ios, tvos, macos]
     steps:
-    - uses: actions/checkout@v3
-    - uses: ruby/setup-ruby@v1
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - uses: ruby/setup-ruby@9eb537ca036ebaed86729dcb9309076e4c5c3b74 # v1.314
     - name: Setup Scripts Directory
       run: ./setup-scripts.sh
     - name: Setup Bundler
@@ -34,8 +37,8 @@ jobs:
   catalyst:
     runs-on: macOS-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: ruby/setup-ruby@v1
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - uses: ruby/setup-ruby@9eb537ca036ebaed86729dcb9309076e4c5c3b74 # v1.314
     - name: Setup Scripts Directory
       run: ./setup-scripts.sh
     - name: Setup Bundler
@@ -48,8 +51,8 @@ jobs:
   # watchos-testapp:
   #   runs-on: macos-12
   #   steps:
-  #   - uses: actions/checkout@v3
-  #   - uses: ruby/setup-ruby@v1
+  #   - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+  #   - uses: ruby/setup-ruby@9eb537ca036ebaed86729dcb9309076e4c5c3b74 # v1.314
   #   - name: Setup Scripts Directory
   #     run: ./setup-scripts.sh
   #   - name: Setup Bundler
@@ -70,8 +73,8 @@ jobs:
         ]
     needs: pod_lib_lint
     steps:
-    - uses: actions/checkout@v3
-    - uses: ruby/setup-ruby@v1
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - uses: ruby/setup-ruby@9eb537ca036ebaed86729dcb9309076e4c5c3b74 # v1.314
     - name: Setup Scripts Directory
       run: ./setup-scripts.sh
     - name: Setup Bundler
diff --git a/.github/workflows/spm.yml b/.github/workflows/spm.yml
index 543b4537..7c0e2f69 100644
--- a/.github/workflows/spm.yml
+++ b/.github/workflows/spm.yml
@@ -6,23 +6,26 @@ on:
     # Run every day at 11pm (PST) - cron uses UTC times
     - cron:  '0 7 * * *'
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs:
   swift-build-run:
-    runs-on: macOS-latest
+    runs-on: macOS-26
     strategy:
       matrix:
         target: [iOS, tvOS, macOS, catalyst]
     steps:
-    - uses: actions/checkout@v3
-    - uses: ruby/setup-ruby@v1
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - uses: ruby/setup-ruby@9eb537ca036ebaed86729dcb9309076e4c5c3b74 # v1.314
     - name: Setup Scripts Directory
       run: ./setup-scripts.sh
     - name: Xcode
-      run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode_26.4.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
diff --git a/.ruby-version b/.ruby-version
index fa376edc..47b322c9 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-2.7
+3.4.1
diff --git a/Gemfile b/Gemfile
index 5b693ac2..7dfba34c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,4 @@ source 'https://rubygems.org'
 
 gem 'cocoapods', '1.16.2'
 gem 'cocoapods-generate', '2.2.5'
-gem 'danger', '8.4.5'
+gem 'danger', '>= 9.3.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index e347e462..9a821ff6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,32 +1,28 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    CFPropertyList (3.0.7)
-      base64
-      nkf
-      rexml
-    activesupport (7.1.5.1)
+    CFPropertyList (3.0.8)
+    activesupport (7.2.3.1)
       base64
       benchmark (>= 0.3)
       bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+      concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
       logger (>= 1.4.2)
-      minitest (>= 5.1)
-      mutex_m
+      minitest (>= 5.1, < 6)
       securerandom (>= 0.3)
-      tzinfo (~> 2.0)
+      tzinfo (~> 2.0, >= 2.0.5)
     addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     algoliasearch (1.27.5)
       httpclient (~> 2.8, >= 2.8.3)
       json (>= 1.5.1)
     atomos (0.1.3)
-    base64 (0.2.0)
-    benchmark (0.4.0)
-    bigdecimal (3.1.9)
+    base64 (0.3.0)
+    benchmark (0.5.0)
+    bigdecimal (4.1.2)
     claide (1.1.0)
     claide-plugins (0.9.2)
       cork
@@ -74,97 +70,89 @@ GEM
     cocoapods-try (1.2.0)
     colored2 (3.1.2)
     concurrent-ruby (1.3.7)
-    connection_pool (2.5.0)
+    connection_pool (3.0.2)
     cork (0.3.0)
       colored2 (~> 3.1)
-    danger (8.4.5)
+    danger (9.6.0)
+      base64 (~> 0.2)
       claide (~> 1.0)
       claide-plugins (>= 0.9.2)
-      colored2 (~> 3.1)
+      colored2 (>= 3.1, < 5)
       cork (~> 0.1)
-      faraday (>= 0.9.0, < 2.0)
+      faraday (>= 0.9.0, < 3.0)
       faraday-http-cache (~> 2.0)
-      git (~> 1.7)
-      kramdown (~> 2.3)
+      git (>= 1.13)
+      kramdown (>= 2.5.1, < 3.0)
       kramdown-parser-gfm (~> 1.0)
-      no_proxy_fix
-      octokit (~> 4.7)
-      terminal-table (>= 1, < 4)
-    drb (2.2.1)
+      octokit (>= 4.0)
+      pstore (~> 0.1)
+      terminal-table (>= 1, < 5)
+    drb (2.2.3)
     escape (0.0.4)
-    ethon (0.16.0)
+    ethon (0.18.0)
       ffi (>= 1.15.0)
-    faraday (1.10.5)
-      faraday-em_http (~> 1.0)
-      faraday-em_synchrony (~> 1.0)
-      faraday-excon (~> 1.1)
-      faraday-httpclient (~> 1.0)
-      faraday-multipart (~> 1.0)
-      faraday-net_http (~> 1.0)
-      faraday-net_http_persistent (~> 1.0)
-      faraday-patron (~> 1.0)
-      faraday-rack (~> 1.0)
-      faraday-retry (~> 1.0)
-      ruby2_keywords (>= 0.0.4)
-    faraday-em_http (1.0.0)
-    faraday-em_synchrony (1.0.1)
-    faraday-excon (1.1.0)
-    faraday-http-cache (2.4.1)
+      logger
+    faraday (2.14.3)
+      faraday-net_http (>= 2.0, < 3.5)
+      json
+      logger
+    faraday-http-cache (2.7.0)
       faraday (>= 0.8)
-    faraday-httpclient (1.0.1)
-    faraday-multipart (1.2.0)
-      multipart-post (~> 2.0)
-    faraday-net_http (1.0.2)
-    faraday-net_http_persistent (1.2.0)
-    faraday-patron (1.0.0)
-    faraday-rack (1.0.0)
-    faraday-retry (1.0.3)
-    ffi (1.17.2)
+    faraday-net_http (3.4.4)
+      net-http (~> 0.5)
+    ffi (1.17.4)
     fourflusher (2.3.1)
     fuzzy_match (2.0.4)
     gh_inspector (1.1.3)
-    git (1.18.0)
+    git (4.3.2)
+      activesupport (>= 5.0)
       addressable (~> 2.8)
-      rchardet (~> 1.8)
+      process_executer (~> 4.0)
+      rchardet (~> 1.9)
     httpclient (2.9.0)
       mutex_m
-    i18n (1.14.7)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
-    json (2.10.2)
-    kramdown (2.4.0)
-      rexml
+    json (2.20.0)
+    kramdown (2.5.2)
+      rexml (>= 3.4.4)
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     logger (1.7.0)
-    minitest (5.25.5)
+    minitest (5.27.0)
     molinillo (0.8.0)
-    multipart-post (2.4.1)
     mutex_m (0.3.0)
     nanaimo (0.4.0)
     nap (1.1.0)
+    net-http (0.9.1)
+      uri (>= 0.11.1)
     netrc (0.11.0)
-    nkf (0.2.0)
-    no_proxy_fix (0.1.2)
-    octokit (4.25.1)
+    octokit (10.0.0)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     open4 (1.3.4)
+    process_executer (4.0.4)
+      track_open_instances (~> 0.1)
+    pstore (0.2.1)
     public_suffix (4.0.7)
-    rchardet (1.8.0)
-    rexml (3.4.2)
+    rchardet (1.10.2)
+    rexml (3.4.4)
     ruby-macho (2.5.1)
-    ruby2_keywords (0.0.5)
-    sawyer (0.9.2)
+    sawyer (0.9.3)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
-    securerandom (0.3.2)
-    terminal-table (3.0.2)
-      unicode-display_width (>= 1.1.1, < 3)
-    typhoeus (1.4.1)
-      ethon (>= 0.9.0)
+    securerandom (0.4.1)
+    terminal-table (4.0.0)
+      unicode-display_width (>= 1.1.1, < 4)
+    track_open_instances (0.1.15)
+    typhoeus (1.6.0)
+      ethon (>= 0.18.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.2.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    uri (1.1.1)
     xcodeproj (1.27.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
@@ -179,7 +167,7 @@ PLATFORMS
 DEPENDENCIES
   cocoapods (= 1.16.2)
   cocoapods-generate (= 2.2.5)
-  danger (= 8.4.5)
+  danger (>= 9.3.1)
 
 BUNDLED WITH
-   2.1.4
+   2.6.2
diff --git a/GoogleDataTransport/GDTCCTLibrary/GDTCCTNanopbHelpers.m b/GoogleDataTransport/GDTCCTLibrary/GDTCCTNanopbHelpers.m
index 450fda8d..84a93264 100644
--- a/GoogleDataTransport/GDTCCTLibrary/GDTCCTNanopbHelpers.m
+++ b/GoogleDataTransport/GDTCCTLibrary/GDTCCTNanopbHelpers.m
@@ -35,12 +35,12 @@
 
 #pragma mark - General purpose encoders
 
-pb_bytes_array_t *GDTCCTEncodeString(NSString *string) {
+pb_bytes_array_t *_Nullable GDTCCTEncodeString(NSString *string) {
   NSData *stringBytes = [string dataUsingEncoding:NSUTF8StringEncoding];
   return GDTCCTEncodeData(stringBytes);
 }
 
-pb_bytes_array_t *GDTCCTEncodeData(NSData *data) {
+pb_bytes_array_t *_Nullable GDTCCTEncodeData(NSData *data) {
   pb_bytes_array_t *pbBytesArray = calloc(1, PB_BYTES_ARRAY_T_ALLOCSIZE(data.length));
   if (pbBytesArray != NULL) {
     [data getBytes:pbBytesArray->bytes length:data.length];
diff --git a/GoogleDataTransport/GDTCCTLibrary/Private/GDTCCTNanopbHelpers.h b/GoogleDataTransport/GDTCCTLibrary/Private/GDTCCTNanopbHelpers.h
index 2f0ccd0f..a0cd81f3 100644
--- a/GoogleDataTransport/GDTCCTLibrary/Private/GDTCCTNanopbHelpers.h
+++ b/GoogleDataTransport/GDTCCTLibrary/Private/GDTCCTNanopbHelpers.h
@@ -34,7 +34,7 @@ NS_ASSUME_NONNULL_BEGIN
  * @param string The string to convert.
  * @return A newly allocated array of bytes representing the UTF8 encoding of the string.
  */
-pb_bytes_array_t *GDTCCTEncodeString(NSString *string);
+pb_bytes_array_t *_Nullable GDTCCTEncodeString(NSString *string);
 
 /** Converts an NSData to a pb_bytes_array_t*.
  *
@@ -43,7 +43,7 @@ pb_bytes_array_t *GDTCCTEncodeString(NSString *string);
  * @param data The data to convert.
  * @return A newly allocated array of bytes with [data bytes] copied into it.
  */
-pb_bytes_array_t *GDTCCTEncodeData(NSData *data);
+pb_bytes_array_t *_Nullable GDTCCTEncodeData(NSData *data);
 
 #pragma mark - CCT object constructors