diff --git a/Apps/Sandcastle/gallery/Particle System Weather.html b/Apps/Sandcastle/gallery/Particle System Weather.html
index 7035b4d507e1..e1854b1afa51 100644
--- a/Apps/Sandcastle/gallery/Particle System Weather.html	
+++ b/Apps/Sandcastle/gallery/Particle System Weather.html	
@@ -75,7 +75,7 @@
     emitter : new Cesium.SphereEmitter(snowRadius),
     startScale : 0.5,
     endScale : 1.0,
-    image : "../../SampleData/snowflake_particle.png",
+    image : '../../SampleData/snowflake_particle.png',
     emissionRate : 7000.0,
     startColor : Cesium.Color.WHITE.withAlpha(0.0),
     endColor : Cesium.Color.WHITE.withAlpha(1.0),
@@ -114,7 +114,7 @@
     emitter : new Cesium.SphereEmitter(rainRadius),
     startScale : 1.0,
     endScale : 0.0,
-    image : "../../SampleData/circular_particle.png",
+    image : '../../SampleData/circular_particle.png',
     emissionRate : 9000.0,
     startColor :new Cesium.Color(0.27, 0.5, 0.70, 0.0),
     endColor : new Cesium.Color(0.27, 0.5, 0.70, 0.98),
diff --git a/Apps/Sandcastle/gallery/Particle System.html b/Apps/Sandcastle/gallery/Particle System.html
index ea86ed3e60f7..0fdc7852ef08 100644
--- a/Apps/Sandcastle/gallery/Particle System.html	
+++ b/Apps/Sandcastle/gallery/Particle System.html	
@@ -325,8 +325,12 @@
 Cesium.knockout.getObservable(viewModel, 'particleSize').subscribe(
     function(newValue) {
         var particleSize = parseFloat(newValue);
-        particleSystem.imageSize.x = particleSize;
-        particleSystem.imageSize.y = particleSize;
+        if (particleSystem.imageSize) {
+            particleSystem.imageSize.x = particleSize;
+            particleSystem.imageSize.y = particleSize;
+        } else {
+            particleSystem.imageSize = new Cesium.Cartesian2(particleSize, particleSize);
+        }
     }
 );
 
diff --git a/CHANGES.md b/CHANGES.md
index f49e19e5cd16..ad402267a05b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -36,11 +36,6 @@ Change Log
 * Fixed crash bug in PolylineCollection when a polyline was updated and removed at the same time. [#6455](https://github.com/AnalyticalGraphicsInc/cesium/pull/6455)
 * Fixed Imagery Layers Texture Filters Sandcastle example. [#6472](https://github.com/AnalyticalGraphicsInc/cesium/pull/6472).
 
-##### Deprecated :hourglass_flowing_sand:
-* `Particle.size`, `ParticleSystem.rate`, `ParticleSystem.lifeTime`, `ParticleSystem.life`, `ParticleSystem.minimumLife`, and `ParticleSystem.maximumLife` have been renamed to `Particle.imageSize`, `ParticleSystem.emissionRate`, `ParticleSystem.lifetime`, `ParticleSystem.particleLife`, `ParticleSystem.minimumParticleLife`, and `ParticleSystem.maximumParticleLife`. Use of the `size`, `rate`, `lifeTime`, `life`, `minimumLife`, and `maximumLife` parameters is deprecated and will be removed in Cesium 1.46.
-* `ParticleSystem.forces` array has been switched out for singular function `ParticleSystems.updateCallback`. Use of the `forces` parameter is deprecated and will be removed in Cesium 1.46.
-* Any width and height variables in `ParticleSystem` will no longer be individual components. `ParticleSystem.minimumWidth` and `ParticleSystem.minimumHeight` will now be `ParticleSystem.minimumImageSize`, `ParticleSystem.maximumWidth` and `ParticleSystem.maximumHeight` will now be `ParticleSystem.maximumImageSize`, and `ParticleSystem.width` and `ParticleSystem.height` will now be `ParticleSystem.imageSize`. Use of the `minimumWidth`, `minimumHeight`, `maximumWidth`, `maximumHeight`, `width`, and `height` parameters is deprecated and will be removed in Cesium 1.46.
-
 ### 1.44 - 2018-04-02
 
 ##### Highlights :sparkler: