diff --git a/src/negative_test/pnpm-workspace/frozen-lockfile-type.yaml b/src/negative_test/pnpm-workspace/frozen-lockfile-type.yaml
new file mode 100644
index 00000000000..aaf455cf3a8
--- /dev/null
+++ b/src/negative_test/pnpm-workspace/frozen-lockfile-type.yaml
@@ -0,0 +1,2 @@
+# yaml-language-server: $schema=../../schemas/json/pnpm-workspace.json
+frozenLockfile: 'true'
diff --git a/src/schemas/json/pnpm-workspace.json b/src/schemas/json/pnpm-workspace.json
index e643ca49569..bc7030fa044 100644
--- a/src/schemas/json/pnpm-workspace.json
+++ b/src/schemas/json/pnpm-workspace.json
@@ -542,6 +542,10 @@
       "description": "When set to false, pnpm won't read or generate a pnpm-lock.yaml file.",
       "type": "boolean"
     },
+    "frozenLockfile": {
+      "description": "When true, installation fails if the lockfile is missing or needs to be updated.",
+      "type": "boolean"
+    },
     "preferFrozenLockfile": {
       "description": "When set to true and the available pnpm-lock.yaml satisfies the package.json dependencies directive, a headless installation is performed.",
       "type": "boolean"
diff --git a/src/test/pnpm-workspace/pnpm-workspace.yaml b/src/test/pnpm-workspace/pnpm-workspace.yaml
index d8dce8f2a2b..a4908074bde 100644
--- a/src/test/pnpm-workspace/pnpm-workspace.yaml
+++ b/src/test/pnpm-workspace/pnpm-workspace.yaml
@@ -25,6 +25,9 @@ saveExact: true
 # https://pnpm.io/settings/other#savetypes
 saveTypes: true
 
+# https://pnpm.io/cli/install#--frozen-lockfile
+frozenLockfile: true
+
 # https://pnpm.io/cli/install#--prefer-offline
 preferOffline: true
 
diff --git a/src/test/pnpm-workspace/pnpm-workspace2.yaml b/src/test/pnpm-workspace/pnpm-workspace2.yaml
index 20330862517..1e9045e0036 100644
--- a/src/test/pnpm-workspace/pnpm-workspace2.yaml
+++ b/src/test/pnpm-workspace/pnpm-workspace2.yaml
@@ -1,3 +1,6 @@
 # yaml-language-server: $schema=../../schemas/json/pnpm-workspace.json
 # https://pnpm.io/catalogs
 catalog: null
+
+# https://pnpm.io/cli/install#--frozen-lockfile
+frozenLockfile: false