diff --git a/package.json b/package.json
index c97b0e62a..29ab09a34 100644
--- a/package.json
+++ b/package.json
@@ -56,17 +56,17 @@
     "tcomb": "3.2.22",
     "tcomb-react": "0.9.3",
     "tlds": "1.194.0",
-    "typelevel-ts": "0.1.2"
+    "typelevel-ts": "0.2.3"
   },
   "devDependencies": {
+    "@types/classnames": "2.2.3",
     "@types/enzyme": "2.8.6",
     "@types/faker": "4.1.2",
+    "@types/fixed-data-table": "0.6.32",
     "@types/jest": "20.0.7",
+    "@types/linkify-it": "2.0.1",
     "@types/lodash": "4.14.74",
     "@types/node": "8.0.25",
-    "@types/classnames": "2.2.3",
-    "@types/fixed-data-table": "0.6.32",
-    "@types/linkify-it": "2.0.1",
     "@types/prop-types": "15.5.2",
     "@types/react": "^15.6.1",
     "@types/react-dates": "12.1.2",
@@ -95,7 +95,7 @@
     "style-loader": "0.17.0",
     "ts-jest": "20.0.10",
     "ts-loader": "2.3.4",
-    "typescript": "2.4.2",
+    "typescript": "2.6.2",
     "webpack": "3.5.5"
   },
   "peerDependencies": {
diff --git a/src/FocusableView/FocusableView.tsx b/src/FocusableView/FocusableView.tsx
index e6388b41b..6033ab050 100644
--- a/src/FocusableView/FocusableView.tsx
+++ b/src/FocusableView/FocusableView.tsx
@@ -94,7 +94,7 @@ export class FocusableView extends React.Component<FocusableView.Props> {
     }
   }
 
-  onFocusBlurEventDebounced = debounce(this._onFocusBlurEvent, this.defaultedProps().debounce)
+  onFocusBlurEventDebounced: ((type: string) => void) & _.Cancelable = debounce(this._onFocusBlurEvent, this.defaultedProps().debounce)
 
   onFocusBlurEvent = ({ type }: React.FocusEvent<HTMLElement>) => (
     !t.Nil.is(this.defaultedProps().debounce) ? this.onFocusBlurEventDebounced(type) : this._onFocusBlurEvent(type)
diff --git a/src/Tablo/Column/columnUtility.ts b/src/Tablo/Column/columnUtility.ts
index 239f72ab7..d49a5c8fe 100644
--- a/src/Tablo/Column/columnUtility.ts
+++ b/src/Tablo/Column/columnUtility.ts
@@ -22,7 +22,7 @@ export const getColumnList = <T, K extends string>(children: TabloChildren<T, K>
   return thereAreGroups ? flatMap(chArray, ch => Children.toArray(ch.props.children)) : chArray;
 };
 
-export const updateColumns = curry(<T, K extends string>(children: TabloChildren<T, K>, update: UpdateColumnsHandler<T, K>): JSX.Element[] => {
+export const updateColumns: _.CurriedFunction2<{}, {}, JSX.Element[]> = curry(<T, K extends string>(children: TabloChildren<T, K>, update: UpdateColumnsHandler<T, K>): JSX.Element[] => {
   const updateIfColumn = (colGroup?: React.ReactElement<ColumnGroup.Props<T, K>>) => (col: React.ReactElement<Column.Props<T, K>>, index: number) => col.type === Column ? update({ col , index, colGroup }) : col;
   const chArray = Children.toArray(children) as React.ReactElement<Column.Props<T, K> | ColumnGroup.Props<T, K>>[];
   const thereAreGroups = chArray.filter(ch => ch.type === ColumnGroup).length > 0;
diff --git a/src/Tablo/plugins/columnsReorder/htmlBackend.ts b/src/Tablo/plugins/columnsReorder/htmlBackend.ts
index 7cc5448f7..71f839496 100644
--- a/src/Tablo/plugins/columnsReorder/htmlBackend.ts
+++ b/src/Tablo/plugins/columnsReorder/htmlBackend.ts
@@ -1,5 +1,5 @@
 import HTML5Backend from 'react-dnd-html5-backend';
 import { DragDropContext } from 'react-dnd';
 
-const dragDropContextHTML5Backend = DragDropContext(HTML5Backend);
+const dragDropContextHTML5Backend: <P>(componentClass: React.ComponentClass<P> | React.StatelessComponent<P>) => __ReactDnd.ContextComponentClass<P> = DragDropContext(HTML5Backend);
 export default dragDropContextHTML5Backend;
diff --git a/src/Tablo/plugins/columnsResize/columnsResizeGrid.tsx b/src/Tablo/plugins/columnsResize/columnsResizeGrid.tsx
index 2adf42ad8..56f1e200b 100644
--- a/src/Tablo/plugins/columnsResize/columnsResizeGrid.tsx
+++ b/src/Tablo/plugins/columnsResize/columnsResizeGrid.tsx
@@ -35,7 +35,7 @@ const getLocals = <T, K extends string>({ onColumnResize, ...props }: Tablo.Prop
     isColumnResizing: false,
     children: __children,
     ...gridProps
-  };
+  } as Tablo.Props<T, K>; // TODO: remove cast -> error on `onColumnsResizeEndCallback`
 
 };
 
diff --git a/src/Tablo/utils.ts b/src/Tablo/utils.ts
index ea95859ae..5142d04ba 100644
--- a/src/Tablo/utils.ts
+++ b/src/Tablo/utils.ts
@@ -1 +1 @@
-export const getArrayChildren = (maybeArrayChildren?: React.ReactElement<any> | React.ReactElement<any>[]): React.ReactElement<any>[] | undefined => maybeArrayChildren ? Array.isArray(maybeArrayChildren) ? maybeArrayChildren : [maybeArrayChildren] : undefined;
+export const getArrayChildren: (maybeArrayChildren?: React.ReactElement<any> | React.ReactElement<any>[] | undefined) => React.ReactElement<any>[] | undefined = maybeArrayChildren => maybeArrayChildren ? Array.isArray(maybeArrayChildren) ? maybeArrayChildren : [maybeArrayChildren] : undefined;
diff --git a/src/TextOverflow/TextOverflow.tsx b/src/TextOverflow/TextOverflow.tsx
index a526ae05d..0d6c1700d 100644
--- a/src/TextOverflow/TextOverflow.tsx
+++ b/src/TextOverflow/TextOverflow.tsx
@@ -126,7 +126,7 @@ export class TextOverflow extends React.Component<TextOverflow.Props, State> {
 
   _onMouseEvent = (type: string) => (type === 'mouseenter') && this.onMouseEnter();
 
-  onMouseEventDebounced = debounce(this._onMouseEvent, this.props.delayWhenLazy);
+  onMouseEventDebounced: ((type: string) => false | void) & _.Cancelable = debounce(this._onMouseEvent, this.props.delayWhenLazy);
 
   onMouseEvent: React.MouseEventHandler<Element> = ({ type }) => {
     this.props.delayWhenLazy ? this.onMouseEventDebounced(type) : this._onMouseEvent(type)
diff --git a/typings/css-element-queries.d.ts b/typings/css-element-queries.d.ts
index 4dec79264..65f1a4594 100644
--- a/typings/css-element-queries.d.ts
+++ b/typings/css-element-queries.d.ts
@@ -1,5 +1,6 @@
 declare module 'css-element-queries/src/ResizeSensor' {
-  export = class ResizeSensor {
+  class ResizeSensor {
     constructor(element: (Element | Element[]), callback: Function);
   }
+  export = ResizeSensor
 }