diff --git a/scripts/release-linux.sh b/scripts/release-linux.sh
index 570712f0..b554ed70 100755
--- a/scripts/release-linux.sh
+++ b/scripts/release-linux.sh
@@ -14,7 +14,7 @@ fi
 
 cd linuxbuild
 
-cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS="-O2" -DCMAKE_CXX_FLAGS="-O2 -Wall -Wextra -Wno-unused-parameter -Werror" .. || exit 1
+cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS="-O3" -DCMAKE_CXX_FLAGS="-O3 -Wall -Wextra -Wno-unused-parameter -Werror" .. || exit 1
 make -j4 || exit 1
 
 cd ..