diff --git a/CHANGELOG.md b/CHANGELOG.md
index 270cea9c..5ecb9bf5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [#539](https://github.com/equinor/webviz-config/pull/539) - Support using OAuth behind proxy. If silent refresh of OAuth token fails, fall back to loud refresh of token instead of raising internal server error.
 - [#550](https://github.com/equinor/webviz-config/pull/550) - Change user data directory on Windows from `Application Data` to `AppData` (both work on Windows 10, but only the latter works on Windows 11).
 - [#546](https://github.com/equinor/webviz-config/pull/546) - Replaced `cp` with `copyfiles` in `package.json`'s `postinstall` script and added note to `README`.
+- [#552](https://github.com/equinor/webviz-config/pull/552) - Fix Windows problem when calling `gh api` in Radix deploy.
 
 ## [0.3.6] - 2021-11-08
 
diff --git a/webviz_config/_deployment/github_cli.py b/webviz_config/_deployment/github_cli.py
index e7b172b0..778302a4 100644
--- a/webviz_config/_deployment/github_cli.py
+++ b/webviz_config/_deployment/github_cli.py
@@ -82,27 +82,22 @@ def turn_on_github_vulnerability_alers(directory: Path) -> None:
 
 
 def _call_post_api(endpoint: str, data: dict, directory: Path) -> None:
-    _, temp_file = tempfile.mkstemp()
-
-    try:
-        Path(temp_file).write_text(json.dumps(data))
-
-        subprocess.run(
-            [
-                "gh",
-                "api",
-                endpoint,
-                "--method",
-                "POST",
-                "--input",
-                temp_file,
-                "--silent",
-            ],
-            check=True,
-            cwd=directory,
-        )
-    finally:
-        Path(temp_file).unlink()
+    subprocess.run(
+        [
+            "gh",
+            "api",
+            endpoint,
+            "--method",
+            "POST",
+            "--input",
+            "-",
+            "--silent",
+        ],
+        input=json.dumps(data),
+        check=True,
+        cwd=directory,
+        text=True,
+    )
 
 
 def add_webhook(directory: Path, receiver_url: str, secret: str) -> None: