diff --git a/contracts/InternalMarket/InternalMarket.sol b/contracts/InternalMarket/InternalMarket.sol
index 9a5bb9e..8ecff95 100644
--- a/contracts/InternalMarket/InternalMarket.sol
+++ b/contracts/InternalMarket/InternalMarket.sol
@@ -50,6 +50,13 @@ contract InternalMarket is Initializable, HasRole, InternalMarketBase {
      * @param amount The amount of tokens to offer for sale.
      */
     function makeOffer(uint256 amount) public virtual {
+        require(
+            _shareholderRegistry.isAtLeast(
+                _shareholderRegistry.CONTRIBUTOR_STATUS(),
+                msg.sender
+            ),
+            "InternalMarket: only contributors can make offers"
+        );
         _makeOffer(_msgSender(), amount);
     }
 
diff --git a/test/Integration.ts b/test/Integration.ts
index 2960394..e50b1f2 100644
--- a/test/Integration.ts
+++ b/test/Integration.ts
@@ -679,6 +679,11 @@ describe("Integration", async () => {
         "Resolution: account cannot vote"
       );
 
+      // user3 cannot offer tokens
+      await expect(internalMarket.connect(user3).makeOffer(10)).revertedWith(
+        "InternalMarket: only contributors can make offers"
+      );
+
       // ... and finally the world is saved.
       expect(await resolutionManager.getResolutionResult(resolutionId)).to.be
         .true;
diff --git a/test/InternalMarket.ts b/test/InternalMarket.ts
index 2e9f669..16e6b37 100644
--- a/test/InternalMarket.ts
+++ b/test/InternalMarket.ts
@@ -202,6 +202,13 @@ describe("InternalMarket", async () => {
       );
     });
 
+    it("should revert when called by a non-contributor", async () => {
+      registry.isAtLeast.returns(false);
+      await expect(internalMarket.makeOffer(1000)).revertedWith(
+        "InternalMarket: only contributors can make offers"
+      );
+    });
+
     describe("redeem", async () => {
       describe("with some unlocked tokens", async () => {
         beforeEach(async () => {
diff --git a/test/RedemptionController.ts b/test/RedemptionController.ts
index 6957209..0a1d47c 100644
--- a/test/RedemptionController.ts
+++ b/test/RedemptionController.ts
@@ -202,7 +202,7 @@ describe("RedemptionController", () => {
       );
     });
 
-    describe.only("when 10 tokens are redeemable", async () => {
+    describe("when 10 tokens are redeemable", async () => {
       beforeEach(async () => {
         await redemptionController.afterMint(account.address, 10);
         await redemptionController.afterOffer(account.address, 10);