diff --git a/package.json b/package.json
index 20ef916..37e5ec3 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "lint": "yarn lint:eslint && yarn lint:misc --check",
     "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write",
     "build:clean": "rimraf dist && yarn build",
-    "build": "tsc --project .",
+    "build": "tsc --project tsconfig.build.json",
     "changelog": "node dist/cli.js"
   },
   "dependencies": {
@@ -61,7 +61,7 @@
     "prettier": "^2.2.1",
     "rimraf": "^3.0.2",
     "ts-jest": "^26.5.6",
-    "typescript": "^4.2.4"
+    "typescript": "~4.8.4"
   },
   "lavamoat": {
     "allowScripts": {
diff --git a/src/cli.ts b/src/cli.ts
index 03604e6..2d438fa 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -183,6 +183,19 @@ async function validate({
   }
 }
 
+/**
+ * Returns whether an error has an error code or not.
+ *
+ * @param error - The error to check.
+ * @returns True if the error is a real error and has a code property, false otherwise.
+ */
+function hasErrorCode(error: unknown): error is Error & { code: unknown } {
+  return (
+    error instanceof Error &&
+    Object.prototype.hasOwnProperty.call(error, 'code')
+  );
+}
+
 type InitOptions = {
   changelogPath: string;
   repoUrl: string;
@@ -303,14 +316,16 @@ async function main() {
         );
       }
     } catch (error) {
-      if (error.code === 'ENOENT') {
-        return exitWithError(
-          `Root directory specified does not exist: '${projectRootDirectory}'`,
-        );
-      } else if (error.code === 'EACCES') {
-        return exitWithError(
-          `Access to root directory is forbidden by file access permissions: '${projectRootDirectory}'`,
-        );
+      if (hasErrorCode(error)) {
+        if (error.code === 'ENOENT') {
+          return exitWithError(
+            `Root directory specified does not exist: '${projectRootDirectory}'`,
+          );
+        } else if (error.code === 'EACCES') {
+          return exitWithError(
+            `Access to root directory is forbidden by file access permissions: '${projectRootDirectory}'`,
+          );
+        }
       }
       throw error;
     }
@@ -328,15 +343,19 @@ async function main() {
       const manifest = JSON.parse(manifestText);
       currentVersion = manifest.version;
     } catch (error) {
-      if (error.code === 'ENOENT') {
-        return exitWithError(
-          `Package manifest not found at path: '${manifestPath}'\nRun this script from the project root directory, or set the project directory using the '--root' flag.`,
-        );
-      } else if (error.code === 'EACCES') {
-        return exitWithError(
-          `Access to package manifest is forbidden by file access permissions: '${manifestPath}'`,
-        );
-      } else if (error.name === 'SyntaxError') {
+      if (hasErrorCode(error)) {
+        if (error.code === 'ENOENT') {
+          return exitWithError(
+            `Package manifest not found at path: '${manifestPath}'\nRun this script from the project root directory, or set the project directory using the '--root' flag.`,
+          );
+        } else if (error.code === 'EACCES') {
+          return exitWithError(
+            `Access to package manifest is forbidden by file access permissions: '${manifestPath}'`,
+          );
+        }
+      }
+
+      if (error instanceof Error && error.name === 'SyntaxError') {
         return exitWithError(
           `Package manifest cannot be parsed as JSON: '${manifestPath}'`,
         );
@@ -376,7 +395,7 @@ async function main() {
       // eslint-disable-next-line no-bitwise
       await fs.access(changelogPath, fsConstants.F_OK | fsConstants.W_OK);
     } catch (error) {
-      if (error.code === 'ENOENT') {
+      if (hasErrorCode(error) && error.code === 'ENOENT') {
         return exitWithError(`File does not exist: '${changelogPath}'`);
       }
       return exitWithError(`File is not writable: '${changelogPath}'`);
diff --git a/tsconfig.build.json b/tsconfig.build.json
new file mode 100644
index 0000000..c6e00d6
--- /dev/null
+++ b/tsconfig.build.json
@@ -0,0 +1,13 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "inlineSources": true,
+    "noEmit": false,
+    "outDir": "dist",
+    "rootDir": "src",
+    "sourceMap": true
+  },
+  "include": ["./src/**/*.ts"],
+  "exclude": ["./src/**/*.test.ts"]
+}
diff --git a/tsconfig.json b/tsconfig.json
index f27b02c..8f2082b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,18 +1,14 @@
 {
   "compilerOptions": {
-    "declaration": true,
     "esModuleInterop": true,
-    "inlineSources": true,
+    "forceConsistentCasingInFileNames": true,
     "lib": ["ES2020"],
     "module": "CommonJS",
-    "moduleResolution": "Node",
-    "outDir": "dist",
-    "rootDir": "src",
-    "sourceMap": true,
+    "moduleResolution": "node",
+    "noEmit": true,
+    "noErrorTruncation": true,
     "strict": true,
-    "target": "ES2019",
-    "typeRoots": ["./node_modules/@types"]
+    "target": "ES2019"
   },
-  "exclude": ["**/*.test.ts"],
-  "include": ["./src/**/*.ts"]
+  "exclude": ["./dist/**/*"]
 }
diff --git a/yarn.lock b/yarn.lock
index 33d5d7a..de5bfb1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -739,7 +739,7 @@ __metadata:
     rimraf: ^3.0.2
     semver: ^7.3.5
     ts-jest: ^26.5.6
-    typescript: ^4.2.4
+    typescript: ~4.8.4
     yargs: ^17.0.1
   bin:
     auto-changelog: dist/cli.js
@@ -7181,23 +7181,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"typescript@npm:^4.2.4":
-  version: 4.2.4
-  resolution: "typescript@npm:4.2.4"
+"typescript@npm:~4.8.4":
+  version: 4.8.4
+  resolution: "typescript@npm:4.8.4"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 89c397df192f239359ad798b96d8e8d552e12c0c189ac5676cec4c20c410d6eec636b8e59a88f2aef0a56d961a9678d99c400099be9b7cae2f7b062eb4b7b171
+  checksum: 3e4f061658e0c8f36c820802fa809e0fd812b85687a9a2f5430bc3d0368e37d1c9605c3ce9b39df9a05af2ece67b1d844f9f6ea8ff42819f13bcb80f85629af0
   languageName: node
   linkType: hard
 
-"typescript@patch:typescript@^4.2.4#~builtin<compat/typescript>":
-  version: 4.2.4
-  resolution: "typescript@patch:typescript@npm%3A4.2.4#~builtin<compat/typescript>::version=4.2.4&hash=701156"
+"typescript@patch:typescript@~4.8.4#~builtin<compat/typescript>":
+  version: 4.8.4
+  resolution: "typescript@patch:typescript@npm%3A4.8.4#~builtin<compat/typescript>::version=4.8.4&hash=701156"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: eb86e0e8022e5297f7a7b871b6edfbf33b57049416ada8bf97c358760125c7c79f074fbebd1b8e8230f858ae05eb22ad0e805e8f6acd5eae1fa886681624c15e
+  checksum: 301459fc3eb3b1a38fe91bf96d98eb55da88a9cb17b4ef80b4d105d620f4d547ba776cc27b44cc2ef58b66eda23fe0a74142feb5e79a6fb99f54fc018a696afa
   languageName: node
   linkType: hard