diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5261bd..489325e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -200,7 +200,7 @@
     ignored when block parameter is specified.
     PR [#818](https://github.com/activerecord-hackery/ransack/pull/818).
 
-*   No need pass some arugments to JoinAssociation#join_constraints in Rails 5.1.
+*   No need pass some arguments to JoinAssociation#join_constraints in Rails 5.1.
     PR [#814](https://github.com/activerecord-hackery/ransack/pull/814).
     Fixes [#807](https://github.com/activerecord-hackery/ransack/issues/807).
     Reference [rails/rails#28267](https://github.com/rails/rails/pull/28267)
diff --git a/README.md b/README.md
index 6930c51..06fa4bb 100644
--- a/README.md
+++ b/README.md
@@ -282,7 +282,7 @@ See this feature: https://www.postgresql.org/docs/13/queries-order.html
 
 #### Case Insensitive Sorting in PostgreSQL
 
-In order to request PostgresSQL to do a case insensitive sort for all string columns of a model at once, Ransack can be extended by using this approach:
+In order to request PostgreSQL to do a case insensitive sort for all string columns of a model at once, Ransack can be extended by using this approach:
 
 ```ruby
 module RansackObject
diff --git a/lib/ransack/adapters/active_record/base.rb b/lib/ransack/adapters/active_record/base.rb
index 9ad348a..1cfa5a1 100644
--- a/lib/ransack/adapters/active_record/base.rb
+++ b/lib/ransack/adapters/active_record/base.rb
@@ -70,7 +70,7 @@ module Ransack
         end
 
         # ransack_scope_skip_sanitize_args, by default, returns an empty array.
-        # i.e. use the sanitize_scope_args setting to determin if args should be converted.
+        # i.e. use the sanitize_scope_args setting to determine if args should be converted.
         # For overriding with a list of scopes which should be passed the args as-is.
         #
         def ransackable_scopes_skip_sanitize_args
diff --git a/spec/polyamorous/join_association_spec.rb b/spec/polyamorous/join_association_spec.rb
index b07db29..17335bd 100644
--- a/spec/polyamorous/join_association_spec.rb
+++ b/spec/polyamorous/join_association_spec.rb
@@ -17,7 +17,7 @@ module Polyamorous
       expect(subject).not_to eq new_join_association(reflection, parent.children, Article)
     end
 
-    it 'leaves the orginal reflection intact for thread safety' do
+    it 'leaves the original reflection intact for thread safety' do
       reflection.instance_variable_set(:@klass, Article)
       join_association
       .swapping_reflection_klass(reflection, Person) do |new_reflection|