diff --git a/Dockerfile b/Dockerfile
index 9beb2ff2..0868a713 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # STEP 1 build executable binary
 ############################
 
-FROM alpine:latest AS builder
+FROM alpine:3.20 AS builder
 
 RUN apk add --no-cache \
     gcc \
diff --git a/include/Reading.hpp b/include/Reading.hpp
index 7e88e163..c6769007 100644
--- a/include/Reading.hpp
+++ b/include/Reading.hpp
@@ -26,6 +26,7 @@
 #ifndef _READING_H_
 #define _READING_H_
 
+#include <cstdint>
 #include <sstream>
 #include <string>