diff --git a/.scripts/run_win_build.bat b/.scripts/run_win_build.bat
index 283e143..297498b 100755
--- a/.scripts/run_win_build.bat
+++ b/.scripts/run_win_build.bat
@@ -25,7 +25,7 @@ set "MICROMAMBA_EXE=%MICROMAMBA_TMPDIR%\micromamba.exe"
 
 echo Downloading micromamba %MICROMAMBA_VERSION%
 if not exist "%MICROMAMBA_TMPDIR%" mkdir "%MICROMAMBA_TMPDIR%"
-certutil -urlcache -split -f "%MICROMAMBA_URL%" "%MICROMAMBA_EXE%"
+powershell -ExecutionPolicy Bypass -Command "(New-Object Net.WebClient).DownloadFile('%MICROMAMBA_URL%', '%MICROMAMBA_EXE%')"
 if !errorlevel! neq 0 exit /b !errorlevel!
 
 echo Creating environment
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 9450856..4b98a40 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,5 +1,5 @@
 # code: language: jinja-yaml
-{% set version = "1.20.0" %}
+{% set version = "1.21.0" %}
 
 {% set libs = [
     "common", "exporter_in_memory", "exporter_ostream_metrics",
@@ -20,7 +20,7 @@ package:
 
 source:
   - url: https://github.com/open-telemetry/opentelemetry-cpp/archive/refs/tags/v{{ version }}.tar.gz
-    sha256: 4b6eeb852f075133c21b95948017f13a3e21740e55b921d27e42970a47314297
+    sha256: 98e5546f577a11b52a57faed1f4cc60d8c1daa44760eba393f43eab5a8ec46a2
     patches:
       - patches/0001-cross_compile_grpc_cpp_plugin_path.patch  # [build_platform != target_platform]
       - patches/0002-add-missing-shared-library-dependencies.patch
@@ -36,7 +36,7 @@ requirements:
     - {{ stdlib("c") }}
     - cmake >=3.1
     - ninja
-    - proto-opentelemetry-proto =1.5.0
+    - proto-opentelemetry-proto =1.6.0
 
     # For cross-compiling
     - curl                    # [build_platform != target_platform]