diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f3b8cbe..748592d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -31,6 +31,8 @@ jobs:
           ruby-version: ruby
 
       - run: bundle install
+        env:
+          BUNDLE_FROZEN: true
 
       # zizmor complains that 'v1' is a ref that can be provided by both the branch and tag namespaces.
       # specify that we want the v1 branch.
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 5437892..5fc8621 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -23,4 +23,6 @@ jobs:
           ruby-version: 3.4
 
       - run: bundle install
+        env:
+          BUNDLE_FROZEN: true
       - run: bundle exec rake -t rubocop
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0c04aec..ba40976 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -38,4 +38,6 @@ jobs:
           ruby-version: ${{ matrix.version }}
 
       - run: bundle install
+        env:
+          BUNDLE_FROZEN: true
       - run: bundle exec rake -t test
diff --git a/CHANGELOG.md b/CHANGELOG.md
index da890fa..93aa2c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,16 @@
 # Changelog
 
-## 1.5.0
+## 1.5.1 (2026-01-19)
+
+* Re-release with a fix to the release process. This includes a bump of the
+  gem's version in `Gemfile.lock`.
+
+## 1.5.0 (2026-01-19)
 
 * Unnecessary files were removed from the published .gem. Pull request by
   Orien Madgwick. GitHub #131.
+* Updated `connection_pool` dependency to allow version 3+. Reported by
+  Igor Kasyanchuk. GitHub #140.
 
 ## 1.4.0 (2025-11-20)
 
diff --git a/Gemfile.lock b/Gemfile.lock
index e77ef58..96c88c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    maxmind-geoip2 (1.4.0)
+    maxmind-geoip2 (1.5.1)
       connection_pool (>= 2.2, < 4.0)
       http (>= 4.3, < 6.0)
       maxmind-db (~> 1.4)
@@ -13,6 +13,7 @@ GEM
       public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
     bigdecimal (3.3.1)
+    bigdecimal (3.3.1-java)
     connection_pool (3.0.2)
     crack (1.0.1)
       bigdecimal
@@ -24,6 +25,7 @@ GEM
     ffi (1.17.2-arm-linux-gnu)
     ffi (1.17.2-arm-linux-musl)
     ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-java)
     ffi (1.17.2-x86-linux-gnu)
     ffi (1.17.2-x86-linux-musl)
     ffi (1.17.2-x86_64-darwin)
@@ -42,6 +44,7 @@ GEM
       domain_name (~> 0.5)
     http-form_data (2.3.0)
     json (2.18.0)
+    json (2.18.0-java)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     llhttp-ffi (0.5.1)
@@ -57,6 +60,7 @@ GEM
     prism (1.7.0)
     public_suffix (7.0.0)
     racc (1.8.1)
+    racc (1.8.1-java)
     rainbow (3.1.1)
     rake (13.3.1)
     regexp_parser (2.11.3)
@@ -105,6 +109,7 @@ PLATFORMS
   arm-linux-gnu
   arm-linux-musl
   arm64-darwin
+  java
   ruby
   x86-linux-gnu
   x86-linux-musl
diff --git a/README.md b/README.md
index 49b914c..0eba707 100644
--- a/README.md
+++ b/README.md
@@ -360,7 +360,7 @@ This library uses [Semantic Versioning](https://semver.org/).
 
 ## Copyright and License
 
-This software is Copyright (c) 2020-2025 by MaxMind, Inc.
+This software is Copyright (c) 2020-2026 by MaxMind, Inc.
 
 This is free software, licensed under the [Apache License, Version
 2.0](LICENSE-APACHE) or the [MIT License](LICENSE-MIT), at your option.
diff --git a/dev-bin/release.sh b/dev-bin/release.sh
index d2ee600..ba1e5db 100755
--- a/dev-bin/release.sh
+++ b/dev-bin/release.sh
@@ -32,6 +32,7 @@ fi
 
 check_command perl
 check_command rake
+check_command bundle
 
 # Check that we're not on the main branch
 current_branch=$(git branch --show-current)
@@ -84,6 +85,9 @@ fi
 
 perl -pi -e "s/(?<=VERSION = \').+?(?=\')/$version/g" lib/maxmind/geoip2/version.rb
 
+# Update version in Gemfile.lock.
+bundle install
+
 echo $"Test results:"
 
 rake
diff --git a/lib/maxmind/geoip2/version.rb b/lib/maxmind/geoip2/version.rb
index 01a4a01..4dc484a 100644
--- a/lib/maxmind/geoip2/version.rb
+++ b/lib/maxmind/geoip2/version.rb
@@ -3,6 +3,6 @@
 module MaxMind
   module GeoIP2
     # The Gem version.
-    VERSION = '1.4.0'
+    VERSION = '1.5.1'
   end
 end