diff --git a/types/d3-zoom/d3-zoom-tests.ts b/types/d3-zoom/d3-zoom-tests.ts
index 8ff3f566f5..669b4af8ff 100644
--- a/types/d3-zoom/d3-zoom-tests.ts
+++ b/types/d3-zoom/d3-zoom-tests.ts
@@ -121,6 +121,26 @@ let svgZoom: d3Zoom.ZoomBehavior<SVGRectElement, SVGDatum>;
 
 svgZoom = d3Zoom.zoom<SVGRectElement, SVGDatum>();
 
+// constrain() -------------------------------------------------------------
+
+// chainable
+svgZoom = svgZoom.constrain((transform, extent, translateExtent) => {
+    const t: d3Zoom.ZoomTransform = transform;
+    const ve: [[number, number], [number, number]] = extent;
+    const te: [[number, number], [number, number]] = translateExtent;
+    const dx0 = t.invertX(ve[0][0]) - te[0][0];
+    const dx1 = t.invertX(ve[1][0]) - te[1][0];
+    const dy0 = transform.invertY(ve[0][1]) - te[0][1];
+    const dy1 = transform.invertY(ve[1][1]) - te[1][1];
+    return t.translate(
+        dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
+        dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
+    );
+});
+
+let constraintFn: (transform: d3Zoom.ZoomTransform, extent: [[number, number], [number, number]], translateExtent: [[number, number], [number, number]]) => d3Zoom.ZoomTransform;
+constraintFn = svgZoom.constrain();
+
 // filter() ----------------------------------------------------------------
 
 // chainable
diff --git a/types/d3-zoom/index.d.ts b/types/d3-zoom/index.d.ts
index 1ca39261a5..cf9b1ac89d 100644
--- a/types/d3-zoom/index.d.ts
+++ b/types/d3-zoom/index.d.ts
@@ -1,9 +1,9 @@
-// Type definitions for d3JS d3-zoom module 1.6
+// Type definitions for d3JS d3-zoom module 1.7
 // Project: https://github.com/d3/d3-zoom/
 // Definitions by: Tom Wanzek <https://github.com/tomwanzek>, Alex Ford <https://github.com/gustavderdrache>, Boris Yankov <https://github.com/borisyankov>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-// Last module patch version validated against: 1.6.0
+// Last module patch version validated against: 1.7.0
 
 import { ArrayLike, Selection, TransitionLike, ValueFn } from 'd3-selection';
 import { ZoomView, ZoomInterpolator } from 'd3-interpolate';
@@ -499,6 +499,19 @@ export interface ZoomBehavior<ZoomRefElement extends ZoomedElementBaseType, Datu
      */
     scaleTo(transition: TransitionLike<ZoomRefElement, Datum>, k: ValueFn<ZoomRefElement, Datum, number>): void;
 
+    /**
+     * Returns the current constraint function.
+     * The default implementation attempts to ensure that the viewport extent does not go outside the translate extent.
+     */
+    constrain(): (transform: ZoomTransform, extent: [[number, number], [number, number]], translateExtent: [[number, number], [number, number]]) => ZoomTransform;
+    /**
+     * Sets the transform constraint function to the specified function and returns the zoom behavior.
+     *
+     * @param constraint A constraint function which returns a transform given the current transform, viewport extent and translate extent.
+     * The default implementation attempts to ensure that the viewport extent does not go outside the translate extent.
+     */
+    constrain(constraint: ((transform: ZoomTransform, extent: [[number, number], [number, number]], translateExtent: [[number, number], [number, number]]) => ZoomTransform)): this;
+
     /**
      * Returns the current filter function.
      */
@@ -647,7 +660,7 @@ export interface ZoomBehavior<ZoomRefElement extends ZoomedElementBaseType, Datu
     /**
      * Set the maximum distance that the mouse can move between mousedown and mouseup that will trigger
      * a subsequent click event. If at any point between mousedown and mouseup the mouse is greater than or equal to
-     * distance from its position on mousedown, the click event follwing mouseup will be suppressed.
+     * distance from its position on mousedown, the click event following mouseup will be suppressed.
      *
      * @param distance The distance threshold between mousedown and mouseup measured in client coordinates (event.clientX and event.clientY).
      * The default is zero.