diff --git a/src/addons/Select/index.d.ts b/src/addons/Select/index.d.ts
index 2f12e6b465..0fb0187a98 100644
--- a/src/addons/Select/index.d.ts
+++ b/src/addons/Select/index.d.ts
@@ -8,7 +8,6 @@ import {
 } from '../../modules/Dropdown';
 
 export interface SelectProps extends DropdownProps {
-  selection: true;
 }
 
 interface SelectComponent extends React.StatelessComponent<SelectProps> {
diff --git a/src/collections/Form/index.d.ts b/src/collections/Form/index.d.ts
index 74e51e4955..23d910ac8c 100644
--- a/src/collections/Form/index.d.ts
+++ b/src/collections/Form/index.d.ts
@@ -46,10 +46,6 @@ interface FormProps {
   widths?: 'equal';
 }
 
-interface FormOnSubmitData extends FormProps {
-  formData: {[key: string]: any};
-}
-
 interface FormClass extends React.ComponentClass<FormProps> {
   Field: typeof FormField;
   Button: typeof FormButton;
diff --git a/src/modules/Dropdown/index.d.ts b/src/modules/Dropdown/index.d.ts
index 07d63a3674..31def45b35 100644
--- a/src/modules/Dropdown/index.d.ts
+++ b/src/modules/Dropdown/index.d.ts
@@ -106,7 +106,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onBlur: (event: React.KeyboardEvent<HTMLElement>, data: DropdownProps) => void;
+  onBlur?: (event: React.KeyboardEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called when the user attempts to change the value.
@@ -114,7 +114,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props and proposed value.
    */
-  onChange: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
+  onChange?: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called on click.
@@ -122,7 +122,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onClick: (event: React.KeyboardEvent<HTMLElement>, data: DropdownProps) => void;
+  onClick?: (event: React.KeyboardEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called when a close event happens.
@@ -130,7 +130,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onClose: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
+  onClose?: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called on focus.
@@ -138,7 +138,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onFocus: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
+  onFocus?: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called when a multi-select label is clicked.
@@ -146,7 +146,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All label props.
    */
-  onLabelClick: (event: React.MouseEvent<HTMLElement>, data: LabelProps) => void;
+  onLabelClick?: (event: React.MouseEvent<HTMLElement>, data: LabelProps) => void;
 
   /**
    * Called on mousedown.
@@ -154,7 +154,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onMouseDown: (event: React.MouseEvent<HTMLElement>, data: DropdownProps) => void;
+  onMouseDown?: (event: React.MouseEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called when an open event happens.
@@ -162,7 +162,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onOpen: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
+  onOpen?: (event: React.SyntheticEvent<HTMLElement>, data: DropdownProps) => void;
 
   /**
    * Called on search input change.
@@ -170,7 +170,7 @@ export interface DropdownProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {string} value - Current value of search input.
    */
-  onSearchChange: (event: React.SyntheticEvent<HTMLElement>, value: string) => void;
+  onSearchChange?: (event: React.SyntheticEvent<HTMLElement>, value: string) => void;
 
   /** Controls whether or not the dropdown menu is displayed. */
   open?: boolean;
@@ -305,7 +305,7 @@ interface DropdownItemProps {
    * @param {SyntheticEvent} event - React's original SyntheticEvent.
    * @param {object} data - All props.
    */
-  onClick: (event: React.MouseEvent<HTMLDivElement>, data: DropdownItemProps) => void;
+  onClick?: (event: React.MouseEvent<HTMLDivElement>, data: DropdownItemProps) => void;
 
   /**
    * The item currently selected by keyboard shortcut.