diff --git a/Dockerfile b/Dockerfile
index 96861d6..b00e45d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,8 @@ FROM ghcr.io/linuxserver/baseimage-alpine:3.19 as buildstage
 # package version
 ARG ZNC_RELEASE
 
+ENV MAKEFLAGS="-j4"
+
 RUN \
   echo "**** install build packages ****" && \
   apk add -U --update --no-cache \
@@ -33,7 +35,7 @@ RUN \
   echo "**** compile znc ****" && \
   if [ -z ${ZNC_RELEASE+x} ]; then \
     ZNC_RELEASE=$(curl -s https://api.github.com/repos/znc/znc/tags \
-    | jq -r 'first(.[] | select(.name | contains("-rc") | not)) | .name'); \
+    | jq -r 'first(.[] | select(.name | test("-rc|-beta|-alpha") | not)) | .name'); \
   fi && \
   mkdir -p \
     /tmp/znc && \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 3d2e499..385b3ba 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -6,6 +6,8 @@ FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.19 as buildstage
 # package version
 ARG ZNC_RELEASE
 
+ENV MAKEFLAGS="-j4"
+
 RUN \
   apk add -U --update --no-cache \
     argon2-dev \
@@ -32,7 +34,7 @@ RUN \
   echo "**** compile znc ****" && \
   if [ -z ${ZNC_RELEASE+x} ]; then \
     ZNC_RELEASE=$(curl -s https://api.github.com/repos/znc/znc/tags \
-    | jq -r 'first(.[] | select(.name | contains("-rc") | not)) | .name'); \
+    | jq -r 'first(.[] | select(.name | test("-rc|-beta|-alpha") | not)) | .name'); \
   fi && \
   mkdir -p \
     /tmp/znc && \
diff --git a/README.md b/README.md
index 7aff2e6..1f4c281 100644
--- a/README.md
+++ b/README.md
@@ -275,6 +275,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **26.03.24:** - Switch back to multi-threaded builds and ignore `-beta` and `-alpha` tags as well as `-rc`.
 * **22.02.24:** - Update build system for v1.9.0 (use cmake).
 * **23.12.23:** - Rebase to Alpine 3.19.
 * **12.07.23:** - Rebasing to Alpine 3.18.
diff --git a/readme-vars.yml b/readme-vars.yml
index 6bd4a39..6ba784a 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -45,6 +45,7 @@ app_setup_block: |
   `change password ASAP.`
 # changelog
 changelogs:
+  - {date: "26.03.24:", desc: "Switch back to multi-threaded builds and ignore `-beta` and `-alpha` tags as well as `-rc`."}
   - {date: "22.02.24:", desc: "Update build system for v1.9.0 (use cmake)."}
   - {date: "23.12.23:", desc: "Rebase to Alpine 3.19."}
   - {date: "12.07.23:", desc: "Rebasing to Alpine 3.18."}