diff --git a/Cargo.toml b/Cargo.toml
index 8d6c0a5..0364ac2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -58,7 +58,7 @@ codegen-units = 1
 debug = 2
 debug-assertions = true
 incremental = false
-opt-level = 1
+opt-level = 2
 lto = "fat"
 overflow-checks = true
 
@@ -71,7 +71,7 @@ incremental = false
 lto = 'fat'
 # opt level needs to be benchmarked after every major feature
 # due to the changes in binary size and alignment
-opt-level = 1
+opt-level = 2
 overflow-checks = false
 
 # do not optimize proc-macro crates = faster builds from scratch