diff --git a/src/commands/config/getSetReset.ts b/src/commands/config/getSetReset.ts
index b7499316..3f45e6f2 100644
--- a/src/commands/config/getSetReset.ts
+++ b/src/commands/config/getSetReset.ts
@@ -7,7 +7,12 @@ export class ConfigActions extends BaseAction {
   }
 
   set(keyValue: string): void {
-    const [key, value] = keyValue.split("=");
+    // Split on the first "=" only. Config values legitimately contain "=" —
+    // base64 padding, URLs with a query string — and splitting on every one
+    // silently stored a truncated value.
+    const separatorIndex = keyValue.indexOf("=");
+    const key = separatorIndex === -1 ? "" : keyValue.slice(0, separatorIndex);
+    const value = separatorIndex === -1 ? undefined : keyValue.slice(separatorIndex + 1);
     this.startSpinner(`Updating configuration: ${key}`);
 
     if (!key || value === undefined) {
diff --git a/tests/actions/getSetReset.test.ts b/tests/actions/getSetReset.test.ts
index fb0ded72..33cf2833 100644
--- a/tests/actions/getSetReset.test.ts
+++ b/tests/actions/getSetReset.test.ts
@@ -28,6 +28,27 @@ describe("ConfigActions", () => {
     expect(configActions["succeedSpinner"]).toHaveBeenCalledWith("Configuration successfully updated");
   });
 
+  test("set method keeps '=' inside the value", () => {
+    configActions.set("apiKey=YWJjZGVm==");
+
+    expect(configActions["writeConfig"]).toHaveBeenCalledWith("apiKey", "YWJjZGVm==");
+  });
+
+  test("set method keeps a query string intact", () => {
+    configActions.set("rpcUrl=https://rpc.example.com/v1?key=abc&mode=fast");
+
+    expect(configActions["writeConfig"]).toHaveBeenCalledWith(
+      "rpcUrl",
+      "https://rpc.example.com/v1?key=abc&mode=fast",
+    );
+  });
+
+  test("set method accepts an empty value", () => {
+    configActions.set("defaultNetwork=");
+
+    expect(configActions["writeConfig"]).toHaveBeenCalledWith("defaultNetwork", "");
+  });
+
   test("set method fails for invalid format", () => {
     configActions.set("invalidFormat");