diff --git a/.ruby-version b/.ruby-version
index 944880f..bea438e 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.0
+3.3.1
diff --git a/Dockerfile b/Dockerfile
index 4deb06c..ba597b5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@
 # Push to public ECR:
 # docker buildx imagetools create -t public.ecr.aws/stefansundin/rssbox stefansundin/rssbox
 
-FROM stefansundin/ruby:3.2-jemalloc
+FROM stefansundin/ruby:3.3-jemalloc
 LABEL org.opencontainers.image.authors="Stefan Sundin"
 LABEL org.opencontainers.image.url="https://github.com/stefansundin/rssbox"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 83bfa24..02abddb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,32 +19,32 @@ GEM
     concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
     crass (1.0.6)
-    dotenv (3.1.0)
+    dotenv (3.1.1)
     feedjira (3.2.3)
       loofah (>= 2.3.1, < 3)
       sax-machine (>= 1.0, < 2)
     github-release-party (0.4.3)
       rake (>= 12)
     io-console (0.7.2)
-    irb (1.12.0)
-      rdoc
+    irb (1.13.1)
+      rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    method_source (1.0.0)
+    method_source (1.1.0)
     multi_json (1.15.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    newrelic_rpm (9.7.1)
-    nio4r (2.7.0)
-    nokogiri (1.16.3-aarch64-linux)
+    newrelic_rpm (9.9.0)
+    nio4r (2.7.1)
+    nokogiri (1.16.4-aarch64-linux)
       racc (~> 1.4)
-    nokogiri (1.16.3-arm-linux)
+    nokogiri (1.16.4-arm-linux)
       racc (~> 1.4)
-    nokogiri (1.16.3-arm64-darwin)
+    nokogiri (1.16.4-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.3-x86_64-linux)
+    nokogiri (1.16.4-x86_64-linux)
       racc (~> 1.4)
     opengraph_parser (0.2.5)
       addressable
@@ -60,26 +60,26 @@ GEM
       slop (~> 3.0)
     psych (5.1.2)
       stringio
-    public_suffix (5.0.4)
+    public_suffix (5.0.5)
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.7.3)
-    rack (3.0.9.1)
+    rack (3.0.10)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rack-ssl-enforcer (0.2.9)
-    rake (13.1.0)
+    rake (13.2.1)
     rbtree3 (0.7.1)
-    rdoc (6.6.2)
+    rdoc (6.6.3.1)
       psych (>= 4.0.0)
-    redis (5.1.0)
-      redis-client (>= 0.17.0)
-    redis-client (0.21.0)
+    redis (5.2.0)
+      redis-client (>= 0.22.0)
+    redis-client (0.22.1)
       connection_pool
-    reline (0.4.3)
+    reline (0.5.5)
       io-console (~> 0.5)
     ruby2_keywords (0.0.5)
     sax-machine (1.3.2)
@@ -135,7 +135,7 @@ DEPENDENCIES
   tzinfo
 
 RUBY VERSION
-   ruby 3.2.2p53
+   ruby 3.3.1p55
 
 BUNDLED WITH
-   2.4.19
+   2.5.9