diff --git a/Shared/NPC.cs b/Shared/NPC.cs
index e4fa341..d8d2587 100644
--- a/Shared/NPC.cs
+++ b/Shared/NPC.cs
@@ -69,7 +69,7 @@ namespace SemiColinGames {
 
     public void Draw(SpriteBatch spriteBatch) {
       Rectangle textureSource = Sprites.Executioner.GetTextureSource(
-          fsm.StateName, (int) Clock.ModelTime.TotalMilliseconds);
+          fsm.StateName, Clock.ModelTime.TotalSeconds);
       // TODO: move this into Sprite metadata.
       Vector2 spriteCenter = new Vector2(spriteWidth / 2, spriteHeight / 2 + spriteCenterYOffset);
       SpriteEffects effect = Facing == 1 ?
diff --git a/Shared/Player.cs b/Shared/Player.cs
index 2591abb..b3c8429 100644
--- a/Shared/Player.cs
+++ b/Shared/Player.cs
@@ -232,7 +232,7 @@ namespace SemiColinGames {
     }
 
     private Rectangle GetTextureSource(Pose pose) {
-      int time = (int) Clock.ModelTime.TotalMilliseconds;
+      double time = Clock.ModelTime.TotalSeconds;
       switch (pose) {
         case Pose.Walking:
         case Pose.Jumping:
@@ -240,7 +240,7 @@ namespace SemiColinGames {
         case Pose.SwordSwing:
           // TODO: make a proper animation class & FSM-driven animations.
           return Sprites.Ninja.GetTextureSource(
-              "attack_sword", (int) (1000 * (0.3 - swordSwingTime)));
+              "attack_sword", 0.3 - swordSwingTime);
         case Pose.Crouching:
         case Pose.Stretching:
         case Pose.Standing:
diff --git a/Shared/Sprites.cs b/Shared/Sprites.cs
index 6661c45..e4cffd6 100644
--- a/Shared/Sprites.cs
+++ b/Shared/Sprites.cs
@@ -24,24 +24,24 @@ namespace SemiColinGames {
   struct SpriteAnimation {
     public readonly int Start;
     public readonly int End;
-    public readonly int DurationMs;
+    public readonly double Duration;
     public readonly AnimationDirection Direction;
 
-    public SpriteAnimation(int start, int end, int durationMs, AnimationDirection direction) {
+    public SpriteAnimation(int start, int end, double duration, AnimationDirection direction) {
       Start = start;
       End = end;
-      DurationMs = durationMs;
+      Duration = duration;
       Direction = direction;
     }
   }
 
   struct Frame {
     public readonly Rectangle Source;
-    public readonly int DurationMs;
+    public readonly double Duration;
 
-    public Frame(Rectangle source, int durationMs) {
+    public Frame(Rectangle source, double duration) {
       Source = source;
-      DurationMs = durationMs;
+      Duration = duration;
     }
   }
 
@@ -64,9 +64,8 @@ namespace SemiColinGames {
             child.SelectToken("frame.y").Value<int>(),
             child.SelectToken("frame.w").Value<int>(),
             child.SelectToken("frame.h").Value<int>());
-        // TODO: convert all durations to floats.
-        int durationMs = child.SelectToken("duration").Value<int>();
-        frames.Add(new Frame(source, durationMs));
+        double duration = child.SelectToken("duration").Value<double>() / 1000;
+        frames.Add(new Frame(source, duration));
       }
 
       JToken frameTags = json.SelectToken("meta.frameTags");
@@ -77,25 +76,25 @@ namespace SemiColinGames {
         string directionString = child.SelectToken("direction").Value<string>();
         AnimationDirection direction = directionString == "pingpong" ?
             AnimationDirection.PingPong : AnimationDirection.Forward;
-        int durationMs = 0;
+        double duration = 0;
         for (int i = start; i <= end; i++) {
-          durationMs += frames[i].DurationMs;
+          duration += frames[i].Duration;
         }
         // A PingPong animation repeats every frame but the first and last.
         // Therefore its duration is 2x, minus the duration of the first and last frames.
         if (direction == AnimationDirection.PingPong) {
-          durationMs = durationMs * 2 - frames[start].DurationMs - frames[end].DurationMs;
+          duration = duration * 2 - frames[start].Duration - frames[end].Duration;
         }
 
-        animations[name] = new SpriteAnimation(start, end, durationMs, direction);
+        animations[name] = new SpriteAnimation(start, end, duration, direction);
       }
     }
 
-    public Rectangle GetTextureSource(string animationName, int timeMs) {
+    public Rectangle GetTextureSource(string animationName, double time) {
       SpriteAnimation animation = animations[animationName];
-      int time = timeMs % animation.DurationMs;
+      time %= animation.Duration;
       for (int i = animation.Start; i <= animation.End; i++) {
-        int frameTime = frames[i].DurationMs;
+        double frameTime = frames[i].Duration;
         if (time < frameTime) {
           return frames[i].Source;
         }
@@ -103,7 +102,7 @@ namespace SemiColinGames {
       }
       if (animation.Direction == AnimationDirection.PingPong) {
         for (int i = animation.End - 1; i > animation.Start; i--) {
-          int frameTime = frames[i].DurationMs;
+          double frameTime = frames[i].Duration;
           if (time < frameTime) {
             return frames[i].Source;
           }