diff --git a/.changeset/weak-zebras-live.md b/.changeset/weak-zebras-live.md
new file mode 100644
index 00000000..d3bae743
--- /dev/null
+++ b/.changeset/weak-zebras-live.md
@@ -0,0 +1,7 @@
+---
+'@sigstore/conformance': minor
+'@sigstore/mock-server': minor
+'@sigstore/cli': minor
+---
+
+Drop support for node 16
diff --git a/.github/workflows/compatibility-check.yml b/.github/workflows/compatibility-check.yml
index 20343d9b..85b275f4 100644
--- a/.github/workflows/compatibility-check.yml
+++ b/.github/workflows/compatibility-check.yml
@@ -23,7 +23,7 @@ jobs:
     - name: Setup node
       uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3
       with:
-        node-version: 16
+        node-version: 18
         cache: npm
     - name: Install CLI
       run: npm install -g @sigstore/cli
diff --git a/.github/workflows/conformance.yml b/.github/workflows/conformance.yml
index da71dafd..1d5e664c 100644
--- a/.github/workflows/conformance.yml
+++ b/.github/workflows/conformance.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Setup node
       uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3
       with:
-        node-version: 16
+        node-version: 18
         cache: npm
     - name: Install dependencies
       run: npm ci
diff --git a/.github/workflows/smoke-test.yml b/.github/workflows/smoke-test.yml
index 2091ad08..31cdc66e 100644
--- a/.github/workflows/smoke-test.yml
+++ b/.github/workflows/smoke-test.yml
@@ -23,7 +23,7 @@ jobs:
     - name: Setup node
       uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3
       with:
-        node-version: 16
+        node-version: 18
         cache: npm
     - name: Install dependencies
       run: npm ci
@@ -61,7 +61,7 @@ jobs:
     - name: Setup node
       uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3
       with:
-        node-version: 16
+        node-version: 18
         cache: npm
     - name: Install dependencies
       run: npm ci
diff --git a/package-lock.json b/package-lock.json
index 9bf6c997..c6f390a7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14048,7 +14048,7 @@
         "tslib": "^2.6.1"
       },
       "engines": {
-        "node": "^16.14.0 || >=18.0.0"
+        "node": ">=18.0.0"
       }
     },
     "packages/client": {
@@ -14087,7 +14087,7 @@
         "tslib": "^2.6.1"
       },
       "engines": {
-        "node": "^16.14.0 || >=18.0.0"
+        "node": ">=18.0.0"
       }
     },
     "packages/jest": {
@@ -14149,7 +14149,7 @@
         "tslib": "^2.6.1"
       },
       "engines": {
-        "node": "^16.14.0 || >=18.0.0"
+        "node": ">=18.0.0"
       }
     },
     "packages/oauth": {
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 49d8b4e2..2ecf6c78 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -60,6 +60,6 @@
     "topicSeparator": " "
   },
   "engines": {
-    "node": "^16.14.0 || >=18.0.0"
+    "node": ">=18.0.0"
   }
 }
diff --git a/packages/conformance/package.json b/packages/conformance/package.json
index 4ee5bc5d..5e6feec7 100644
--- a/packages/conformance/package.json
+++ b/packages/conformance/package.json
@@ -30,6 +30,6 @@
     "topicSeparator": " "
   },
   "engines": {
-    "node": "^16.14.0 || >=18.0.0"
+    "node": ">=18.0.0"
   }
 }
diff --git a/packages/mock-server/package.json b/packages/mock-server/package.json
index 9042f3c7..00cca084 100644
--- a/packages/mock-server/package.json
+++ b/packages/mock-server/package.json
@@ -35,6 +35,6 @@
     "commands": "./dist"
   },
   "engines": {
-    "node": "^16.14.0 || >=18.0.0"
+    "node": ">=18.0.0"
   }
 }