diff --git a/.changeset/poor-bees-juggle.md b/.changeset/poor-bees-juggle.md
new file mode 100644
index 0000000000..6e92110eea
--- /dev/null
+++ b/.changeset/poor-bees-juggle.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Moves `shikiji-core` from `devDependencies` to `dependencies` to prevent type errors
diff --git a/packages/astro/package.json b/packages/astro/package.json
index 6ae5e1aab8..7ee618eddd 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -169,7 +169,8 @@
     "resolve": "^1.22.4",
     "semver": "^7.5.4",
     "server-destroy": "^1.0.1",
-    "shikiji": "^0.9.18",
+    "shikiji": "^0.9.19",
+    "shikiji-core": "^0.9.19",
     "string-width": "^7.0.0",
     "strip-ansi": "^7.1.0",
     "tsconfck": "^3.0.0",
@@ -228,7 +229,6 @@
     "remark-code-titles": "^0.1.2",
     "rollup": "^4.5.0",
     "sass": "^1.69.5",
-    "shikiji-core": "^0.9.18",
     "srcset-parse": "^1.1.0",
     "unified": "^11.0.4"
   },
diff --git a/packages/markdown/remark/package.json b/packages/markdown/remark/package.json
index 6a398ee83b..965b057cde 100644
--- a/packages/markdown/remark/package.json
+++ b/packages/markdown/remark/package.json
@@ -44,7 +44,7 @@
     "remark-parse": "^11.0.0",
     "remark-rehype": "^11.0.0",
     "remark-smartypants": "^2.0.0",
-    "shikiji": "^0.9.18",
+    "shikiji": "^0.9.19",
     "unified": "^11.0.4",
     "unist-util-visit": "^5.0.0",
     "vfile": "^6.0.1"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2fd13891ce..c917a7c35e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -654,8 +654,11 @@ importers:
         specifier: ^1.0.1
         version: 1.0.1
       shikiji:
-        specifier: ^0.9.18
-        version: 0.9.18
+        specifier: ^0.9.19
+        version: 0.9.19
+      shikiji-core:
+        specifier: ^0.9.19
+        version: 0.9.19
       string-width:
         specifier: ^7.0.0
         version: 7.0.0
@@ -820,9 +823,6 @@ importers:
       sass:
         specifier: ^1.69.5
         version: 1.69.6
-      shikiji-core:
-        specifier: ^0.9.18
-        version: 0.9.18
       srcset-parse:
         specifier: ^1.1.0
         version: 1.1.0
@@ -5065,8 +5065,8 @@ importers:
         specifier: ^2.0.0
         version: 2.0.0
       shikiji:
-        specifier: ^0.9.18
-        version: 0.9.18
+        specifier: ^0.9.19
+        version: 0.9.19
       unified:
         specifier: ^11.0.4
         version: 11.0.4
@@ -14391,13 +14391,14 @@ packages:
       vscode-textmate: 5.2.0
     dev: true
 
-  /shikiji-core@0.9.18:
-    resolution: {integrity: sha512-PKTXptbrp/WEDjNHV8OFG9KkfhmR0pSd161kzlDDlgQ0HXAnqJYNDSjqsy1CYZMx5bSvLMy42yJj9oFTqmkNTQ==}
+  /shikiji-core@0.9.19:
+    resolution: {integrity: sha512-AFJu/vcNT21t0e6YrfadZ+9q86gvPum6iywRyt1OtIPjPFe25RQnYJyxHQPMLKCCWA992TPxmEmbNcOZCAJclw==}
+    dev: false
 
-  /shikiji@0.9.18:
-    resolution: {integrity: sha512-/tFMIdV7UQklzN13VjF0/XFzmii6C606Jc878hNezvB8ZR8FG8FW9j0I4J9EJre0owlnPntgLVPpHqy27Gs+DQ==}
+  /shikiji@0.9.19:
+    resolution: {integrity: sha512-Kw2NHWktdcdypCj1GkKpXH4o6Vxz8B8TykPlPuLHOGSV8VkhoCLcFOH4k19K4LXAQYRQmxg+0X/eM+m2sLhAkg==}
     dependencies:
-      shikiji-core: 0.9.18
+      shikiji-core: 0.9.19
     dev: false
 
   /side-channel@1.0.4: