diff --git a/Dockerfiles/proxy-mysql/ubuntu/Dockerfile b/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
index 797353a98..7b65d851f 100644
--- a/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
+++ b/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
@@ -44,6 +44,7 @@ RUN set -eux && \
             fping \
             libcurl4 \
             libevent-2.1 \
+            libevent-pthreads-2.1 \
             libmysqlclient21 \
             libopenipmi0 \
             libpcre2-8-0 \
diff --git a/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile b/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
index 2d2c46f2a..3bfb534f1 100644
--- a/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
@@ -43,6 +43,7 @@ RUN set -eux && \
             fping \
             libcurl4 \
             libevent-2.1 \
+            libevent-pthreads-2.1 \
             libopenipmi0 \
             libpcre2-8-0 \
             libsnmp40 \
diff --git a/Dockerfiles/server-mysql/ubuntu/Dockerfile b/Dockerfiles/server-mysql/ubuntu/Dockerfile
index 649b89d18..d7cd511d4 100644
--- a/Dockerfiles/server-mysql/ubuntu/Dockerfile
+++ b/Dockerfiles/server-mysql/ubuntu/Dockerfile
@@ -47,6 +47,7 @@ RUN set -eux && \
             fping \
             libcurl4 \
             libevent-2.1 \
+            libevent-pthreads-2.1 \
             libmysqlclient21 \
             libopenipmi0 \
             libpcre2-8-0 \
diff --git a/Dockerfiles/server-pgsql/ubuntu/Dockerfile b/Dockerfiles/server-pgsql/ubuntu/Dockerfile
index d90577b57..5c61ba56c 100644
--- a/Dockerfiles/server-pgsql/ubuntu/Dockerfile
+++ b/Dockerfiles/server-pgsql/ubuntu/Dockerfile
@@ -48,6 +48,7 @@ RUN set -eux && \
             fping \
             libcurl4 \
             libevent-2.1 \
+            libevent-pthreads-2.1 \
             libopenipmi0 \
             libpcre2-8-0 \
             libpq5 \