diff --git a/check_curl b/check_curl
index 4fa93ae..41c3833 100755
--- a/check_curl
+++ b/check_curl
@@ -94,7 +94,7 @@ fi
 rm -rf "$TMP_ERROR_LOG"
 
 RESPONSE_CODE=$(echo "$RESPONSE" | head -n 1)
-RESPONSE_TIME=$(printf "%.2f" $(echo "$RESPONSE" | tail -n 1))
+RESPONSE_TIME=$(printf "%.3f" $(echo "$RESPONSE" | tail -n 1))
 
 OUTPUT_MSG=""
 OUTPUT_CODE=0
diff --git a/install.sh b/install.sh
index acb8d90..99b6566 100755
--- a/install.sh
+++ b/install.sh
@@ -4,7 +4,7 @@
 # @hourly /bin/bash /opt/icinga2-checks/install.sh
 
 apt update
-apt install -y python3-venv git sysstat
+apt install -y python3-venv git sysstat bc
 
 pip install psutil