diff --git a/.changesets/maint_fix_version_on_mcp_server_tester_alocay.md b/.changesets/maint_fix_version_on_mcp_server_tester_alocay.md
new file mode 100644
index 00000000..c7028a76
--- /dev/null
+++ b/.changesets/maint_fix_version_on_mcp_server_tester_alocay.md
@@ -0,0 +1,3 @@
+### Fix version on mcp server tester - @alocay PR #374
+
+Add a specific version when calling the mcp-server-tester for e2e tests. The current latest (1.4.1) as an issue so to avoid problems now and in the future updating the test script to invoke the testing tool via specific version.
diff --git a/e2e/mcp-server-tester/run_tests.sh b/e2e/mcp-server-tester/run_tests.sh
index 91647ef5..95c2a6bf 100755
--- a/e2e/mcp-server-tester/run_tests.sh
+++ b/e2e/mcp-server-tester/run_tests.sh
@@ -71,4 +71,4 @@ safe_dir="${safe_dir//|/\\|}"
 sed "s|<test-dir>|$safe_dir|g" "$TEMPLATE_PATH" > "$GEN_CONFIG"
 
 # Run the command
-npx -y mcp-server-tester tools "$TESTS" --server-config "$GEN_CONFIG"
\ No newline at end of file
+npx -y mcp-server-tester@1.4.0 tools "$TESTS" --server-config "$GEN_CONFIG"
\ No newline at end of file