diff --git a/src/pipx/standalone_python.py b/src/pipx/standalone_python.py
index 8d772f5..51322f4 100644
--- a/src/pipx/standalone_python.py
+++ b/src/pipx/standalone_python.py
@@ -193,8 +193,10 @@ def list_pythons() -> Dict[str, str]:
 def resolve_python_version(requested_version: str):
     pythons = list_pythons()
 
+    requested_parts = [int(part) for part in requested_version.split(".")]
     for version, version_download_link in pythons.items():
-        if version.startswith(requested_version):
+        version_parts = [int(part) for part in version.split(".")]
+        if version_parts[:len(requested_parts)] == requested_parts:
             python_version = version
             download_link = version_download_link
             break