diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89c344a..4bbfaae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,6 @@ jobs:
     strategy:
       matrix:
         pg:
-          - 12
           - 13
           - 14
           - 15
@@ -15,7 +14,6 @@ jobs:
           - "3.2"
           - "3.3"
         gemfile:
-          - rails_6.1
           - rails_7.0
           - rails_7.1
           - rails_7.2
diff --git a/Appraisals b/Appraisals
index 7a22a8b..25e827e 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,13 +1,9 @@
-appraise "rails-6.1" do
-  gem "rails", "6.1.7.6"
-end
-
 appraise "rails-7.0" do
   gem "rails", "7.0.8"
 end
 
 appraise "rails-7.1" do
-  gem "rails", "7.1.0"
+  gem "rails", "7.1.5"
 end
 
 appraise "rails-7.2" do
diff --git a/README.md b/README.md
index 2101720..b559e2f 100644
--- a/README.md
+++ b/README.md
@@ -98,8 +98,7 @@ The following functionality is currently unsupported:
 
 ### Compatibility Notes
 
-- While some features may work with other versions, this gem is currently tested against PostgreSQL 12+ and Partman 4.x
-- There is a [bug](https://github.com/rails/rails/pull/41490) in early versions of Rails 6.1 when using `algorithm: :concurrently`. To add / remove indexes concurrently, please upgrade to at least Rails 6.1.4.
+- While some features may work with other versions, this gem is currently tested against PostgreSQL 13+ and Partman 4.x
 
 ### Migration Methods
 
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
deleted file mode 100644
index 644e10f..0000000
--- a/gemfiles/rails_6.1.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rails", "6.1.7.6"
-
-gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
index 43e1b60..0e56cd3 100644
--- a/gemfiles/rails_7.1.gemfile
+++ b/gemfiles/rails_7.1.gemfile
@@ -2,6 +2,6 @@
 
 source "https://rubygems.org"
 
-gem "rails", "7.1.0"
+gem "rails", "7.1.5"
 
 gemspec path: "../"
diff --git a/pg_ha_migrations.gemspec b/pg_ha_migrations.gemspec
index ea3239b..07f5ef6 100644
--- a/pg_ha_migrations.gemspec
+++ b/pg_ha_migrations.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "pry-byebug"
   spec.add_development_dependency "appraisal", "~> 2.5"
 
-  spec.add_dependency "rails", ">= 6.1", "< 7.3"
+  spec.add_dependency "rails", ">= 7.0", "< 7.3"
   spec.add_dependency "relation_to_struct", ">= 1.5.1"
   spec.add_dependency "ruby2_keywords"
 end