diff --git a/src/ppu.js b/src/ppu.js
index 7045cae..b4d71ef 100644
--- a/src/ppu.js
+++ b/src/ppu.js
@@ -1225,18 +1225,20 @@ PPU.prototype = {
 
         if (toffset < 8) {
           // first half of sprite.
-          t = this.ptTile[
-            this.sprTile[0] +
-              (this.vertFlip[0] ? 1 : 0) +
-              ((this.sprTile[0] & 1) !== 0 ? 255 : 0)
-          ];
+          t =
+            this.ptTile[
+              this.sprTile[0] +
+                (this.vertFlip[0] ? 1 : 0) +
+                ((this.sprTile[0] & 1) !== 0 ? 255 : 0)
+            ];
         } else {
           // second half of sprite.
-          t = this.ptTile[
-            this.sprTile[0] +
-              (this.vertFlip[0] ? 0 : 1) +
-              ((this.sprTile[0] & 1) !== 0 ? 255 : 0)
-          ];
+          t =
+            this.ptTile[
+              this.sprTile[0] +
+                (this.vertFlip[0] ? 0 : 1) +
+                ((this.sprTile[0] & 1) !== 0 ? 255 : 0)
+            ];
           if (this.vertFlip[0]) {
             toffset = 15 - toffset;
           } else {
diff --git a/yarn.lock b/yarn.lock
index 90a1d63..6532b79 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2210,8 +2210,8 @@ prettier-check@^2.0.0:
     execa "^0.6.0"
 
 prettier@^2.0.5:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.4.1.tgz#671e11c89c14a4cfc876ce564106c4a6726c9f5c"
 
 process-nextick-args@~1.0.6:
   version "1.0.7"