diff --git a/src/index.ts b/src/index.ts
index 208f3ab..43a3286 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,7 +13,7 @@ const command = define({
     console.error("Error: Please specify a subcommand (init, set, get, pull, or delete)");
     console.error("");
     console.error("Usage:");
-    console.error("  e2sm init   - Initialize .e2smrc.json configuration file");
+    console.error("  e2sm init   - Initialize .e2smrc.jsonc configuration file");
     console.error("  e2sm set    - Upload .env file to AWS Secrets Manager");
     console.error("  e2sm get    - Display secret from AWS Secrets Manager");
     console.error("  e2sm pull   - Pull secret and generate .env file");
diff --git a/src/lib/env.test.ts b/src/lib/env.test.ts
index e9aaba0..9711510 100644
--- a/src/lib/env.test.ts
+++ b/src/lib/env.test.ts
@@ -117,6 +117,31 @@ describe("jsonToEnv", () => {
     const result = jsonToEnv({ FOO: "bar\nbaz" });
     expect(result).toBe('FOO="bar\nbaz"');
   });
+
+  test("converts number values to string", () => {
+    const result = jsonToEnv({ PORT: 3000, DEBUG: 1 });
+    expect(result).toBe('PORT="3000"\nDEBUG="1"');
+  });
+
+  test("converts boolean values to string", () => {
+    const result = jsonToEnv({ ENABLED: true, DISABLED: false });
+    expect(result).toBe('ENABLED="true"\nDISABLED="false"');
+  });
+
+  test("converts null and undefined to string", () => {
+    const result = jsonToEnv({ NULL_VAL: null, UNDEF_VAL: undefined });
+    expect(result).toBe('NULL_VAL="null"\nUNDEF_VAL="undefined"');
+  });
+
+  test("converts object values to JSON string", () => {
+    const result = jsonToEnv({ OBJ: { nested: "value" } });
+    expect(result).toBe('OBJ="{\\"nested\\":\\"value\\"}"');
+  });
+
+  test("converts array values to JSON string", () => {
+    const result = jsonToEnv({ ITEMS: [1, 2, 3] });
+    expect(result).toBe('ITEMS="[1,2,3]"');
+  });
 });
 
 describe("generateEnvHeader", () => {
diff --git a/src/lib/env.ts b/src/lib/env.ts
index dbafbe8..0ce5977 100644
--- a/src/lib/env.ts
+++ b/src/lib/env.ts
@@ -46,10 +46,18 @@ export function parseEnvContent(content: string): Record<string, string> {
 /**
  * Converts JSON object to .env format string.
  */
-export function jsonToEnv(data: Record<string, string>): string {
+export function jsonToEnv(data: Record<string, unknown>): string {
   return Object.entries(data)
     .map(([key, value]) => {
-      const escaped = value.replace(/"/g, '\\"');
+      let stringValue: string;
+      if (typeof value === "string") {
+        stringValue = value;
+      } else if (value !== null && typeof value === "object") {
+        stringValue = JSON.stringify(value);
+      } else {
+        stringValue = String(value);
+      }
+      const escaped = stringValue.replace(/"/g, '\\"');
       return `${key}="${escaped}"`;
     })
     .join("\n");