diff --git a/core/dovecot/Dockerfile b/core/dovecot/Dockerfile
index 3bfd67fc..a9a3f854 100644
--- a/core/dovecot/Dockerfile
+++ b/core/dovecot/Dockerfile
@@ -4,6 +4,7 @@ RUN echo "@testing http://nl.alpinelinux.org/alpine/edge/testing" >> /etc/apk/re
  && apk add --no-cache \
      dovecot dovecot-sqlite dovecot-pigeonhole-plugin dovecot-pigeonhole-plugin-extdata \
      dovecot-fts-lucene rspamd-client@testing python py-jinja2 py-pip \
+ && pip install --upgrade pip
  && pip install tenacity
 
 COPY conf /conf
diff --git a/core/postfix/Dockerfile b/core/postfix/Dockerfile
index 61b8f1ea..bb7acb9b 100644
--- a/core/postfix/Dockerfile
+++ b/core/postfix/Dockerfile
@@ -1,6 +1,7 @@
 FROM alpine:3.7
 
 RUN apk add --no-cache postfix postfix-sqlite postfix-pcre rsyslog python py-jinja2 py-pip \
+ && pip install --upgrade pip \
  && pip install tenacity
 
 COPY conf /conf
diff --git a/services/rspamd/Dockerfile b/services/rspamd/Dockerfile
index e8eb49f9..987e5ab0 100644
--- a/services/rspamd/Dockerfile
+++ b/services/rspamd/Dockerfile
@@ -1,6 +1,7 @@
 FROM alpine:edge
 
 RUN apk add --no-cache python py-jinja2 rspamd rspamd-controller rspamd-proxy ca-certificates py-pip \
+ && pip install --upgrade pip \
  && pip install tenacity
 
 RUN mkdir /run/rspamd