diff --git a/examples/js/src/neighbourSampling-papaparsing/linkForce.js b/examples/js/src/neighbourSampling-papaparsing/linkForce.js
index 89bcb49..163e45e 100644
--- a/examples/js/src/neighbourSampling-papaparsing/linkForce.js
+++ b/examples/js/src/neighbourSampling-papaparsing/linkForce.js
@@ -35,7 +35,6 @@ function startLinkSimulation() {
       return distanceFunction(n.source, n.target, props, norm);
     })
     // Set the parameter for the algorithm (optional).
-    .strength(1);
   // Restart the simulation.
   simulation.alpha(1).restart();
 }
diff --git a/src/link.js b/src/link.js
index 40d4e6b..ad9be61 100644
--- a/src/link.js
+++ b/src/link.js
@@ -45,7 +45,7 @@ export default function(links) {
         x = target.x + target.vx - source.x - source.vx || jiggle();
         y = target.y + target.vy - source.y - source.vy || jiggle();
         l = Math.sqrt(x * x + y * y);
-        l = (l - distances[i]) / l * alpha/* * strengths[i]*/;
+        l = (l - distances[i]) / l * alpha * strengths[i];
         x *= l, y *= l;
         target.vx -= x * (b = bias[i]);
         target.vy -= y * b;