diff --git a/.cargo/config.toml b/.cargo/config.toml
index 35049cb..16fcd7c 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,2 +1,5 @@
 [alias]
 xtask = "run --package xtask --"
+
+[build]
+rustflags = "-Ctarget-cpu=core-avx2"
diff --git a/battlesnake/.cargo/config.toml b/battlesnake/.cargo/config.toml
new file mode 100644
index 0000000..99c4471
--- /dev/null
+++ b/battlesnake/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = "-Ctarget-cpu=core-avx2"