diff --git a/appveyor.yml b/appveyor.yml
index c2fa4bf..bb3f614 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,7 +29,7 @@ install:
   - rustup-init -yv --default-toolchain nightly --default-host x86_64-pc-windows-msvc
   - if defined VCVARS call "%VCVARS%" %VCVARSARG%
   - conda activate
-  - conda install -c conda-forge pycrypto nuitka
+  - conda install -y -c conda-forge pycrypto nuitka
   - pip intall PyQt5 setuptools_rust
 
 test_script: