diff --git a/CHANGELOG.md b/CHANGELOG.md
index 728924e..3063b38 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,5 @@
 ## Unreleased
-[no unreleased changes yet]
+- Remove upper bounds on versions for all dependencies.
 
 ## v0.13.0 (2024-09-08)
 - Add `--topo-order` (topological order) option to `git log` command
diff --git a/Gemfile.lock b/Gemfile.lock
index a83b313..98704a4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,9 +2,9 @@ PATH
   remote: .
   specs:
     fcom (0.13.1.alpha)
-      activesupport (>= 6, < 8)
-      memo_wise (>= 1.7, < 2)
-      rainbow (>= 3.0, < 4)
+      activesupport (>= 6)
+      memo_wise (>= 1.7)
+      rainbow (>= 3.0)
       slop (~> 4.8)
 
 GEM
diff --git a/fcom.gemspec b/fcom.gemspec
index 84ca657..e660ab6 100644
--- a/fcom.gemspec
+++ b/fcom.gemspec
@@ -32,9 +32,9 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency('activesupport', '>= 6', '< 8')
-  spec.add_dependency('memo_wise', '>= 1.7', '< 2')
-  spec.add_dependency('rainbow', '>= 3.0', '< 4')
+  spec.add_dependency('activesupport', '>= 6')
+  spec.add_dependency('memo_wise', '>= 1.7')
+  spec.add_dependency('rainbow', '>= 3.0')
   spec.add_dependency('slop', '~> 4.8')
 
   required_ruby_version = File.read('.ruby-version').rstrip.sub(/\A(\d+\.\d+)\.\d+\z/, '\1.0')