diff --git a/full/Dockerfile b/full/Dockerfile
index 409bf55..7f45ffb 100644
--- a/full/Dockerfile
+++ b/full/Dockerfile
@@ -5,7 +5,7 @@ RUN set -x \
     && apk add --no-cache \
         build-base \
         icu-dev \
-        openssl-dev \
+        libressl-dev \
         perl \
         python3
 COPY znc-build-modules.sh /
diff --git a/slim/Dockerfile b/slim/Dockerfile
index 8bfe4e3..e65c3b5 100644
--- a/slim/Dockerfile
+++ b/slim/Dockerfile
@@ -19,7 +19,6 @@ RUN set -x \
         ca-certificates \
         cyrus-sasl \
         icu \
-        openssl \
         sudo \
         tini \
     && apk add --no-cache --virtual build-dependencies \
@@ -28,7 +27,7 @@ RUN set -x \
         cyrus-sasl-dev \
         gnupg \
         icu-dev \
-        openssl-dev \
+        libressl-dev \
         perl-dev \
         python3-dev \
     && mkdir /znc-src && cd /znc-src \