diff --git a/system/env.sh b/system/env.sh
index 3a397fc..faf1870 100644
--- a/system/env.sh
+++ b/system/env.sh
@@ -76,3 +76,6 @@ export EGET_BIN=$HOME/bin
 # for dotenv
 export ZSH_DOTENV_ALLOWED_LIST=$HOME/.cache/dotenv-allowed.list
 export ZSH_DOTENV_DISALLOWED_LIST=$HOME/.cache/dotenv-disallowed.list
+
+# mamba
+export MAMBA_NO_BANNER=1