diff --git a/src/runtime/controller.ts b/src/runtime/controller.ts
index ae30a8a69..c2b0e61fa 100644
--- a/src/runtime/controller.ts
+++ b/src/runtime/controller.ts
@@ -14,7 +14,7 @@ import { peprStoreCRD } from "../lib/assets/store";
 import { validateHash } from "../lib/helpers";
 const { version } = packageJSON;
 
-function runModule(expectedHash: string) {
+function runModule(expectedHash: string): void {
   const gzPath = `/app/load/module-${expectedHash}.js.gz`;
   const jsPath = `/app/module-${expectedHash}.js`;
 
@@ -59,7 +59,7 @@ Log.info(`Pepr Controller (v${version})`);
 
 const hash = process.argv[2];
 
-const startup = async () => {
+const startup = async (): Promise<void> => {
   try {
     Log.info("Applying the Pepr Store CRD if it doesn't exist");
     await K8s(kind.CustomResourceDefinition).Apply(peprStoreCRD, { force: true });
diff --git a/src/sdk/heredoc.ts b/src/sdk/heredoc.ts
index c80746f0a..eccadee74 100644
--- a/src/sdk/heredoc.ts
+++ b/src/sdk/heredoc.ts
@@ -1,7 +1,7 @@
 // Refs:
 // - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#tagged_templates
 
-export function heredoc(strings: TemplateStringsArray, ...values: string[]) {
+export function heredoc(strings: TemplateStringsArray, ...values: string[]): string {
   // shuffle strings & expression values back together
   const zipped = strings
     .reduce((acc: string[], cur, idx) => {