diff --git a/.eslintignore b/.eslintignore
index 94a7b116..9df7fa5d 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,6 +1,7 @@
 public
 build
 coverage
+cache/**
 node_modules
 src/flowtype/npm
 scripts/solidity/.*
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 00000000..9df7fa5d
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,8 @@
+public
+build
+coverage
+cache/**
+node_modules
+src/flowtype/npm
+scripts/solidity/.*
+**/_old/*
\ No newline at end of file