diff --git a/scripts/markdown-to-markua.sh b/scripts/markdown-to-markua.sh
index 5a8479e..83eb89f 100755
--- a/scripts/markdown-to-markua.sh
+++ b/scripts/markdown-to-markua.sh
@@ -5,10 +5,10 @@ do
     echo "Processing $file..."
 
     # Markua doesn't know what to do with 4 backticks (````), so convert to 3:
-    sed -ie "s/\`\`\`\`/\`\`\`/g" $file
+    sed -i "s/\`\`\`\`/\`\`\`/g" $file
 
     # Can't use relative paths in a book, so make all paths static
-    sed -ie 's/(\//(https:\/\/geek-cookbook.funkypenguin.co.nz\/)/g' $file
+    sed -i 's/(\//(https:\/\/geek-cookbook.funkypenguin.co.nz\/)/g' $file
 
     # strip emojis
     tr -cd '\11\12\15\40-\176' < $file > $file-clean