diff --git a/.ruby-version b/.ruby-version
index 15a2799..818bd47 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.0
+3.0.6
diff --git a/lib/dbf/column.rb b/lib/dbf/column.rb
index b36ce6f..a2bcd7b 100644
--- a/lib/dbf/column.rb
+++ b/lib/dbf/column.rb
@@ -61,7 +61,7 @@ def memo?
     #
     # @return [Hash]
     def to_hash
-      {name:, type:, length:, decimal:}
+      {name: name, type: type, length: length, decimal: decimal}
     end
 
     # Underscored name
diff --git a/lib/dbf/database/foxpro.rb b/lib/dbf/database/foxpro.rb
index b2e1476..fcc65c3 100644
--- a/lib/dbf/database/foxpro.rb
+++ b/lib/dbf/database/foxpro.rb
@@ -105,7 +105,7 @@ def process_field(record, data)
       end
 
       def table_field_hash(name)
-        {name:, fields: []}
+        {name: name, fields: []}
       end
     end
 
diff --git a/lib/dbf/schema.rb b/lib/dbf/schema.rb
index 077a2de..7804caf 100644
--- a/lib/dbf/schema.rb
+++ b/lib/dbf/schema.rb
@@ -37,7 +37,7 @@ module Schema
     # @return [String]
     def schema(format = :activerecord, table_only: false)
       schema_method_name = schema_name(format)
-      send(schema_method_name, table_only:)
+      send(schema_method_name, table_only: table_only)
     rescue NameError
       raise ArgumentError, ":#{format} is not a valid schema. Valid schemas are: #{FORMATS.join(', ')}."
     end
diff --git a/spec/dbf/record_spec.rb b/spec/dbf/record_spec.rb
index 3b3648d..72b6ded 100644
--- a/spec/dbf/record_spec.rb
+++ b/spec/dbf/record_spec.rb
@@ -50,7 +50,7 @@
 
     describe 'if other attributes match' do
       let(:attributes) { {x: 1, y: 2} }
-      let(:other) { instance_double('DBF::Record', attributes:) }
+      let(:other) { instance_double('DBF::Record', attributes: attributes) }
 
       before do
         allow(record).to receive(:attributes).and_return(attributes)