diff --git a/Dockerfile.buildtests b/Dockerfile.buildtests
index 3a55c1c..3e5b7d3 100644
--- a/Dockerfile.buildtests
+++ b/Dockerfile.buildtests
@@ -1,11 +1,11 @@
-FROM alpine:3.8 AS buildtest-alpine38-static
-RUN apk add --no-cache git build-base autoconf automake libtool linux-headers glib-dev glib-static
+FROM alpine:3.10 AS buildtest-alpine310-static
+RUN apk add --no-cache git build-base autoconf automake libtool linux-headers glib-dev glib-static libcap-static libcap-dev
 COPY . /src
 WORKDIR /src
 RUN ./autogen.sh && ./configure LDFLAGS="-static" && make && cp -f slirp4netns /
 
 FROM ubuntu:18.04 AS buildtest-ubuntu1804-common
-RUN apt update && apt install -y automake autotools-dev make gcc libglib2.0-dev
+RUN apt update && apt install -y automake autotools-dev make gcc libglib2.0-dev libcap-dev
 COPY . /src
 WORKDIR /src
 RUN ./autogen.sh
@@ -17,6 +17,6 @@ FROM buildtest-ubuntu1804-common AS buildtest-ubuntu1804-static
 RUN ./configure LDFLAGS="-static" && make && cp -f slirp4netns /
 
 FROM scratch AS buildtest-final-stage
-COPY --from=buildtest-alpine38-static /slirp4netns /buildtest-alpine38-static
+COPY --from=buildtest-alpine310-static /slirp4netns /buildtest-alpine310-static
 COPY --from=buildtest-ubuntu1804-dynamic /slirp4netns /buildtest-ubuntu1804-dynamic
 COPY --from=buildtest-ubuntu1804-static /slirp4netns /buildtest-ubuntu1804-static
diff --git a/Dockerfile.tests b/Dockerfile.tests
index 618c852..ad04194 100644
--- a/Dockerfile.tests
+++ b/Dockerfile.tests
@@ -1,5 +1,5 @@
 FROM ubuntu:18.04 AS build
-RUN apt update && apt install -y automake autotools-dev make gcc libglib2.0-dev
+RUN apt update && apt install -y automake autotools-dev make gcc libglib2.0-dev libcap-dev
 COPY . /slirp4netns
 WORKDIR /slirp4netns
 RUN chown -R 1000:1000 /slirp4netns