diff --git a/config/initializers/simple_form.rb b/config/initializers/simple_form.rb
index 934487a..f306c19 100644
--- a/config/initializers/simple_form.rb
+++ b/config/initializers/simple_form.rb
@@ -28,8 +28,12 @@ SimpleForm.setup do |config|
     # extensions by default, you can change `b.optional` to `b.use`.
 
     # Calculates maxlength from length validations for string inputs
+    # and/or database column lengths
     b.optional :maxlength
 
+    # Calculate minlength from length validations for string inputs
+    b.optional :minlength
+
     # Calculates pattern from format validations for string inputs
     b.optional :pattern
 
diff --git a/config/initializers/simple_form_bootstrap.rb b/config/initializers/simple_form_bootstrap.rb
index 109d29a..c7705e8 100644
--- a/config/initializers/simple_form_bootstrap.rb
+++ b/config/initializers/simple_form_bootstrap.rb
@@ -8,6 +8,7 @@ SimpleForm.setup do |config|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
+    b.optional :minlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly
@@ -22,6 +23,7 @@ SimpleForm.setup do |config|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
+    b.optional :minlength
     b.optional :readonly
     b.use :label, class: 'control-label'
 
@@ -55,6 +57,7 @@ SimpleForm.setup do |config|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
+    b.optional :minlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly
@@ -71,6 +74,7 @@ SimpleForm.setup do |config|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
+    b.optional :minlength
     b.optional :readonly
     b.use :label, class: 'col-sm-3 control-label'
 
@@ -112,6 +116,7 @@ SimpleForm.setup do |config|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
+    b.optional :minlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly