diff --git a/lib/timeline/Core.js b/lib/timeline/Core.js
index deed13c6d4..8adbd044d1 100644
--- a/lib/timeline/Core.js
+++ b/lib/timeline/Core.js
@@ -936,9 +936,9 @@ class Core {
     const centerContainerClientHeight =  dom.centerContainer.clientHeight;
 
     // calculate border widths
-    props.border.left   = (dom.centerContainer.offsetWidth - dom.centerContainer.clientWidth) / 2;
+    props.border.left   = Math.floor((dom.centerContainer.offsetWidth - dom.centerContainer.clientWidth) / 2);
     props.border.right  = props.border.left;
-    props.border.top    = (dom.centerContainer.offsetHeight - centerContainerClientHeight) / 2;
+    props.border.top    = Math.floor((dom.centerContainer.offsetHeight - centerContainerClientHeight) / 2);
     props.border.bottom = props.border.top;
     props.borderRootHeight = rootOffsetHeight - rootClientHeight;
     props.borderRootWidth = rootOffsetWidth - dom.root.clientWidth;
diff --git a/lib/timeline/component/Component.js b/lib/timeline/component/Component.js
index a382491777..66b7d88aae 100644
--- a/lib/timeline/component/Component.js
+++ b/lib/timeline/component/Component.js
@@ -45,8 +45,10 @@ export default class Component {
    * @protected
    */
   _isResized() {
-    const resized = (this.props._previousWidth !== this.props.width ||
-        this.props._previousHeight !== this.props.height);
+    const resized = (
+      this.props._previousWidth !== this.props.width ||
+      this.props._previousHeight !== this.props.height
+    );
 
     this.props._previousWidth = this.props.width;
     this.props._previousHeight = this.props.height;
diff --git a/lib/timeline/component/Group.js b/lib/timeline/component/Group.js
index 3abcc0fba5..3913bc9f32 100644
--- a/lib/timeline/component/Group.js
+++ b/lib/timeline/component/Group.js
@@ -627,7 +627,7 @@ class Group {
           item.top -= offset;
         });
       }
-      height = max + margin.item.vertical / 2;
+      height = Math.ceil(max + margin.item.vertical / 2);
       if (this.heightMode !== "fitItems") {
         height = Math.max(height, this.props.label.height);
       }