diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index c0af47d..4fca737 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -9,13 +9,17 @@ RUN go build -ldflags "-w -s" -o /frontend
 FROM alpine:edge AS step_1
 
 WORKDIR /root
-RUN apk add --no-cache build-base pkgconf perl gettext
+RUN apk add --no-cache build-base pkgconf perl gettext \
+    libidn2-dev libidn2-static libunistring-dev libunistring-static gnu-libiconv-dev
 
 RUN wget https://github.com/rfc1036/whois/archive/refs/tags/v5.5.18.tar.gz \
     -O whois-5.5.18.tar.gz
+
 RUN tar xvf whois-5.5.18.tar.gz \
     && cd whois-5.5.18 \
-    && make -j4 LDFLAGS="-static" CONFIG_FILE="/etc/whois.conf" \
+    && sed -i "s/#if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 200112L/#if 1/g" config.h \
+    && make whois -j4 \
+      LDFLAGS="-static" CONFIG_FILE="/etc/whois.conf" PKG_CONFIG="pkg-config --static" HAVE_ICONV=1 \
     && strip /root/whois-5.5.18/whois
 
 ################################################################################