diff --git a/HARNESS_VERSION b/HARNESS_VERSION
index 1b619f348..752e63038 100644
--- a/HARNESS_VERSION
+++ b/HARNESS_VERSION
@@ -1 +1 @@
-0.20.5
+0.20.6
diff --git a/tests/test_harness_version.py b/tests/test_harness_version.py
index e1172779b..4bf59e21f 100644
--- a/tests/test_harness_version.py
+++ b/tests/test_harness_version.py
@@ -8,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 def test_original_harness_version_is_canonical_semver() -> None:
     version = (ROOT / "HARNESS_VERSION").read_text(encoding="utf-8").strip()
 
-    assert version == "0.20.5"
+    assert version == "0.20.6"
     assert re.fullmatch(r"\d+\.\d+\.\d+", version)