diff --git a/.env.development b/.env.development
new file mode 100644
index 0000000..b6fa76d
--- /dev/null
+++ b/.env.development
@@ -0,0 +1 @@
+FEE=1.5
diff --git a/.env.production b/.env.production
new file mode 100644
index 0000000..b6fa76d
--- /dev/null
+++ b/.env.production
@@ -0,0 +1 @@
+FEE=1.5
diff --git a/.gitignore b/.gitignore
index f813275..7dd0a94 100644
--- a/.gitignore
+++ b/.gitignore
@@ -67,3 +67,7 @@ yarn-error.log
 .pnp.js
 # Yarn Integrity file
 .yarn-integrity
+
+# Explit files to keep
+!.env.development
+!.env.production