diff --git a/.github/assets/rook-mascot-dark.gif b/.github/assets/rook-mascot-dark.gif
new file mode 100644
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diff --git a/.github/assets/rook-mascot-dark.svg b/.github/assets/rook-mascot-dark.svg
deleted file mode 100644
index 1bb148e..0000000
--- a/.github/assets/rook-mascot-dark.svg
+++ /dev/null
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diff --git a/.github/assets/rook-mascot-light.gif b/.github/assets/rook-mascot-light.gif
new file mode 100644
index 0000000..da20f63
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diff --git a/.github/assets/rook-mascot-light.svg b/.github/assets/rook-mascot-light.svg
deleted file mode 100644
index 564b32c..0000000
--- a/.github/assets/rook-mascot-light.svg
+++ /dev/null
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diff --git a/README.md b/README.md
index 620d8ee..71ab88e 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 <div align="center">
 
 <picture>
-  <source media="(prefers-color-scheme: dark)" srcset=".github/assets/rook-mascot-dark.svg">
-  <img src=".github/assets/rook-mascot-light.svg" alt="rook, the chess-piece mascot" width="150">
+  <source media="(prefers-color-scheme: dark)" srcset=".github/assets/rook-mascot-dark.gif">
+  <img src=".github/assets/rook-mascot-light.gif" alt="rook, the chess-piece mascot" width="200">
 </picture>
 
 # rook