diff --git a/package.json b/package.json
index e497836..e5b891a 100644
--- a/package.json
+++ b/package.json
@@ -24,14 +24,14 @@
   },
   "dependencies": {
     "escape-string-regexp": "^5.0.0",
-    "execa": "^7.1.0"
+    "execa": "^7.1.1"
   },
   "devDependencies": {
-    "ava": "^5.2.0",
-    "c8": "^7.13.0",
+    "ava": "^5.3.1",
+    "c8": "^8.0.0",
     "del": "^7.0.0",
-    "typescript": "^4.9.5",
-    "xo": "^0.53.1"
+    "typescript": "^5.1.3",
+    "xo": "^0.54.2"
   },
   "c8": {
     "reporter": [
diff --git a/test/fixtures/load/tsconfig.json b/test/fixtures/load/tsconfig.json
index 903d623..f4488d1 100644
--- a/test/fixtures/load/tsconfig.json
+++ b/test/fixtures/load/tsconfig.json
@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"strictNullChecks": true,
 		"module": "Node16",
 		"outDir": "compiled"
 	},
diff --git a/test/fixtures/tsconfig.json b/test/fixtures/tsconfig.json
index 47d862c..317eedd 100644
--- a/test/fixtures/tsconfig.json
+++ b/test/fixtures/tsconfig.json
@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"strictNullChecks": true,
 		"outDir": "typescript/compiled"
 	},
 	"include": [