diff --git a/Cargo.lock b/Cargo.lock
index c798c18..5e99fa9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1323,7 +1323,7 @@ dependencies = [
  "once_cell",
  "opener",
  "pathdiff",
- "pulldown-cmark",
+ "pulldown-cmark 0.10.3",
  "regex",
  "serde",
  "serde_json",
@@ -1345,7 +1345,7 @@ dependencies = [
  "env_logger",
  "log",
  "mdbook",
- "pulldown-cmark",
+ "pulldown-cmark 0.10.3",
  "pulldown-cmark-to-cmark",
  "semver",
  "serde",
@@ -1862,6 +1862,17 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "pulldown-cmark"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e8bbe1a966bd2f362681a44f6edce3c2310ac21e4d5067a6e7ec396297a6ea0"
+dependencies = [
+ "bitflags 2.9.0",
+ "memchr",
+ "unicase",
+]
+
 [[package]]
 name = "pulldown-cmark-escape"
 version = "0.10.1"
@@ -1870,11 +1881,11 @@ checksum = "bd348ff538bc9caeda7ee8cad2d1d48236a1f443c1fa3913c6a02fe0043b1dd3"
 
 [[package]]
 name = "pulldown-cmark-to-cmark"
-version = "14.0.1"
+version = "21.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03ac1dab098faca0c377449f5dbe98a222a3f6d67089c2e308bd3c7076cd37bd"
+checksum = "e5b6a0769a491a08b31ea5c62494a8f144ee0987d86d670a8af4df1e1b7cde75"
 dependencies = [
- "pulldown-cmark",
+ "pulldown-cmark 0.13.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 1e32448..275adda 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ semver = "1.0.26"
 toml = "0.5.11"
 serde_json = "1.0.140"
 pulldown-cmark = "0.10.3"
-pulldown-cmark-to-cmark = "14.0.1"
+pulldown-cmark-to-cmark = "21.0.0"
 
 [dependencies.clap]
 version = "4.5.36"