diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index aa3b982..dd13f41 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -97,3 +97,5 @@ jobs:
             BUILDTIME=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
             VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
             REVISION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
diff --git a/.ruby-version b/.ruby-version
index be94e6f..b347b11 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.2.3
diff --git a/Dockerfile b/Dockerfile
index d24335c..5ac6c5b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.2.2-alpine AS Builder
+FROM ruby:3.2.3-alpine AS Builder
 RUN apk add --no-cache build-base
 
 WORKDIR /forecast-collector
@@ -8,7 +8,7 @@ RUN bundle config --local frozen 1 && \
     bundle install -j4 --retry 3 && \
     bundle clean --force
 
-FROM ruby:3.2.2-alpine
+FROM ruby:3.2.3-alpine
 LABEL maintainer="georg@ledermann.dev"
 
 # Decrease memory usage
diff --git a/Gemfile.lock b/Gemfile.lock
index 08cd231..4d59606 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,51 +1,50 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.5)
+    addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
-    base64 (0.1.1)
     climate_control (1.2.0)
     crack (0.4.5)
       rexml
     docile (1.4.0)
     dotenv (2.8.1)
-    hashdiff (1.0.1)
-    influxdb-client (2.9.0)
-    json (2.6.3)
+    hashdiff (1.1.0)
+    influxdb-client (3.0.0)
+    json (2.7.1)
     language_server-protocol (3.17.0.3)
-    minitest (5.20.0)
+    minitest (5.21.2)
     minitest-silence (0.2.4)
       minitest (~> 5.12)
-    parallel (1.23.0)
-    parser (3.2.2.3)
+    parallel (1.24.0)
+    parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
-    public_suffix (5.0.3)
-    racc (1.7.1)
+    public_suffix (5.0.4)
+    racc (1.7.3)
     rainbow (3.1.1)
-    rake (13.0.6)
-    regexp_parser (2.8.1)
+    rake (13.1.0)
+    regexp_parser (2.9.0)
     rexml (3.2.6)
-    rubocop (1.56.3)
-      base64 (~> 0.1.1)
+    rubocop (1.60.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.3)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.29.0)
+    rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
-    rubocop-minitest (0.32.1)
+    rubocop-minitest (0.34.5)
       rubocop (>= 1.39, < 2.0)
-    rubocop-performance (1.19.1)
-      rubocop (>= 1.7.0, < 2.0)
-      rubocop-ast (>= 0.4.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+    rubocop-performance (1.20.2)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
     ruby-progressbar (1.13.0)
@@ -55,7 +54,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
-    unicode-display_width (2.4.2)
+    unicode-display_width (2.5.0)
     vcr (6.2.0)
     webmock (3.19.1)
       addressable (>= 2.8.0)
@@ -81,4 +80,4 @@ DEPENDENCIES
   webmock
 
 BUNDLED WITH
-   2.4.19
+   2.5.5
diff --git a/LICENSE b/LICENSE
index a943813..32f7a76 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020-2023 Georg Ledermann <georg@ledermann.dev>
+Copyright (c) 2020-2024 Georg Ledermann <georg@ledermann.dev>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index 78881e3..209a6a5 100644
--- a/README.md
+++ b/README.md
@@ -28,4 +28,4 @@ https://github.com/solectrus/hosting
 
 ## License
 
-Copyright (c) 2020,2023 Georg Ledermann, released under the MIT License
+Copyright (c) 2020-2024 Georg Ledermann, released under the MIT License
diff --git a/app/main.rb b/app/main.rb
index 4876df4..1991f3b 100755
--- a/app/main.rb
+++ b/app/main.rb
@@ -11,7 +11,7 @@
        "Version #{ENV.fetch('VERSION', '<unknown>')}, " \
        "built at #{ENV.fetch('BUILDTIME', '<unknown>')}"
 puts 'https://github.com/solectrus/forecast-collector'
-puts 'Copyright (c) 2020,2023 Georg Ledermann, released under the MIT License'
+puts 'Copyright (c) 2020-2024 Georg Ledermann, released under the MIT License'
 puts "\n"
 
 config = Config.from_env
diff --git a/test/forecast_test.rb b/test/forecast_test.rb
index 4ba4263..dbe79c1 100644
--- a/test/forecast_test.rb
+++ b/test/forecast_test.rb
@@ -12,10 +12,10 @@ def test_fetch_data_success
         VCR.use_cassette('forecast_solar_success') do
           data = forecast.fetch_data
 
-          assert data.is_a?(Hash)
+          assert_kind_of Hash, data
           data.each do |key, value|
-            assert key.is_a?(Integer)
-            assert value.is_a?(Integer)
+            assert_kind_of Integer, key
+            assert_kind_of Integer, value
           end
         end
       end