diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b14614a..d9333888 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.11"
-      - run: pip install fonttools==4.50
+      - run: pip install fonttools==4.62
       - uses: dtolnay/rust-toolchain@78c2cd7546db85145bb10485288dd4e5063c5093 # 1.89.0
       - run: cargo build
       - run: cargo build --no-default-features
diff --git a/tests/ttx/Cantarell-VF_1.ttx b/tests/ttx/Cantarell-VF_1.ttx
index 27246f36..1064f105 100644
--- a/tests/ttx/Cantarell-VF_1.ttx
+++ b/tests/ttx/Cantarell-VF_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/Cantarell-VF_2.ttx b/tests/ttx/Cantarell-VF_2.ttx
index 9a7c1672..883a7634 100644
--- a/tests/ttx/Cantarell-VF_2.ttx
+++ b/tests/ttx/Cantarell-VF_2.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/ClickerScript-Regular_1.ttx b/tests/ttx/ClickerScript-Regular_1.ttx
index 57f528b2..a86b8f5c 100644
--- a/tests/ttx/ClickerScript-Regular_1.ttx
+++ b/tests/ttx/ClickerScript-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/DejaVuSansMono_1.ttx b/tests/ttx/DejaVuSansMono_1.ttx
index 98c16d0f..3d183af4 100644
--- a/tests/ttx/DejaVuSansMono_1.ttx
+++ b/tests/ttx/DejaVuSansMono_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/LatinModernRoman-Regular_1.ttx b/tests/ttx/LatinModernRoman-Regular_1.ttx
index 2aa56035..91371d2b 100644
--- a/tests/ttx/LatinModernRoman-Regular_1.ttx
+++ b/tests/ttx/LatinModernRoman-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="OTTO" ttLibVersion="4.50">
+<ttFont sfntVersion="OTTO" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/MPLUS1p-Regular_1.ttx b/tests/ttx/MPLUS1p-Regular_1.ttx
index 530d171c..5d4b89f8 100644
--- a/tests/ttx/MPLUS1p-Regular_1.ttx
+++ b/tests/ttx/MPLUS1p-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NewCMMath-Regular_1.ttx b/tests/ttx/NewCMMath-Regular_1.ttx
index ff02d6b1..75fd662f 100644
--- a/tests/ttx/NewCMMath-Regular_1.ttx
+++ b/tests/ttx/NewCMMath-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="OTTO" ttLibVersion="4.50">
+<ttFont sfntVersion="OTTO" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSans-Regular_1.ttx b/tests/ttx/NotoSans-Regular_1.ttx
index 07dad19c..deb4962c 100644
--- a/tests/ttx/NotoSans-Regular_1.ttx
+++ b/tests/ttx/NotoSans-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSans-Regular_var_1.ttx b/tests/ttx/NotoSans-Regular_var_1.ttx
index 5df87f5f..f5a9e8f8 100644
--- a/tests/ttx/NotoSans-Regular_var_1.ttx
+++ b/tests/ttx/NotoSans-Regular_var_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSans-Regular_var_2.ttx b/tests/ttx/NotoSans-Regular_var_2.ttx
index 99f2f98d..3ea7244e 100644
--- a/tests/ttx/NotoSans-Regular_var_2.ttx
+++ b/tests/ttx/NotoSans-Regular_var_2.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSans-Regular_var_3.ttx b/tests/ttx/NotoSans-Regular_var_3.ttx
index 34cede76..f1d62dc9 100644
--- a/tests/ttx/NotoSans-Regular_var_3.ttx
+++ b/tests/ttx/NotoSans-Regular_var_3.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSansCJKsc-Bold-subset1_1.ttx b/tests/ttx/NotoSansCJKsc-Bold-subset1_1.ttx
index de0e0d0a..f0c3ab98 100644
--- a/tests/ttx/NotoSansCJKsc-Bold-subset1_1.ttx
+++ b/tests/ttx/NotoSansCJKsc-Bold-subset1_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="OTTO" ttLibVersion="4.50">
+<ttFont sfntVersion="OTTO" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/NotoSansCJKsc-Regular_1.ttx b/tests/ttx/NotoSansCJKsc-Regular_1.ttx
index 63553014..80db93d4 100644
--- a/tests/ttx/NotoSansCJKsc-Regular_1.ttx
+++ b/tests/ttx/NotoSansCJKsc-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="OTTO" ttLibVersion="4.50">
+<ttFont sfntVersion="OTTO" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
diff --git a/tests/ttx/Roboto-Regular_1.ttx b/tests/ttx/Roboto-Regular_1.ttx
index c1e796f3..e140e140 100644
--- a/tests/ttx/Roboto-Regular_1.ttx
+++ b/tests/ttx/Roboto-Regular_1.ttx
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.50">
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.62">
 
   <GlyphOrder>
     <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->