diff --git a/README.md b/README.md
index 78de49c..ee6c1dd 100644
--- a/README.md
+++ b/README.md
@@ -31,10 +31,10 @@ Ui fixes
 * ~~projects autocomplete~~
 * ~~add time ago to build list~~
 * ~~show scm changes on build page~~
-* react says many many times to console:
-	Warning: setState(...): Can only update a mounted or mounting component.
-	This usually means you called setState() on an unmounted component.
-	This is a no-op.
+* ~~react says many many times to console:~~
+	~~Warning: setState(...): Can only update a mounted or mounting component.~~
+	~~This usually means you called setState() on an unmounted component.~~
+	~~This is a no-op.~~
 * show duration details (steps duration) on build page
 * speed up build points animation at ff
 * current successfully streak icons at project page
diff --git a/static/js/app/components/common/progress/index.js b/static/js/app/components/common/progress/index.js
index cd9a258..eeaaf2e 100644
--- a/static/js/app/components/common/progress/index.js
+++ b/static/js/app/components/common/progress/index.js
@@ -13,13 +13,16 @@ define([
 											build.project.avgBuildDuration * 100);
 		},
 		componentDidMount: function() {
-			var self = this,
-				updateCallback = function() {
+			var self = this;
+			var updateCallback = function() {
 				if (self.props.build.status === 'in-progress') {
-					self.setState({percent: self._computePercent()});
-					_.delay(updateCallback, 100);
+					if (self.isMounted()) {
+						self.setState({percent: self._computePercent()});
+						_.delay(updateCallback, 100);
+					}
 				}
-			}
+			};
+
 			updateCallback();
 		},
 		getInitialState: function() {