diff --git a/pdns-recursor/Dockerfile b/pdns-recursor/Dockerfile
index 270dca5..0657322 100644
--- a/pdns-recursor/Dockerfile
+++ b/pdns-recursor/Dockerfile
@@ -6,7 +6,7 @@ RUN dnf -y --setopt=install_weak_deps=False install \
     python3-setuptools \
   && dnf clean all
 
-RUN pip3 install --no-cache-dir envtpl
+RUN pip3 install --no-cache-dir 'Jinja2<3.1' envtpl
 
 RUN mkdir -p /etc/pdns-recursor/api.d \
   && chown -R pdns-recursor: /etc/pdns-recursor/api.d \
diff --git a/pdns-recursor/Dockerfile.alpine b/pdns-recursor/Dockerfile.alpine
index db16490..6757eec 100644
--- a/pdns-recursor/Dockerfile.alpine
+++ b/pdns-recursor/Dockerfile.alpine
@@ -5,7 +5,7 @@ RUN apk add --no-cache \
     py3-pip \
     python3
 
-RUN pip3 install --no-cache-dir envtpl
+RUN pip3 install --no-cache-dir 'Jinja2<3.1' envtpl
 
 RUN mkdir -p /etc/pdns/api.d \
   && chown -R recursor: /etc/pdns/api.d \
diff --git a/pdns/Dockerfile b/pdns/Dockerfile
index 9b52073..99f5a91 100644
--- a/pdns/Dockerfile
+++ b/pdns/Dockerfile
@@ -10,7 +10,7 @@ RUN sed -i '/tsflags=nodocs/d' /etc/dnf/dnf.conf \
     python3-setuptools \
   && dnf clean all
 
-RUN pip3 install --no-cache-dir envtpl
+RUN pip3 install --no-cache-dir 'Jinja2<3.1' envtpl
 
 ENV VERSION=4.6 \
   PDNS_guardian=yes \
diff --git a/pdns/Dockerfile.alpine b/pdns/Dockerfile.alpine
index fcf5b80..ad8fbe6 100644
--- a/pdns/Dockerfile.alpine
+++ b/pdns/Dockerfile.alpine
@@ -8,7 +8,7 @@ RUN apk add --no-cache \
     py3-pip \
     python3
 
-RUN pip3 install --no-cache-dir envtpl
+RUN pip3 install --no-cache-dir 'Jinja2<3.1' envtpl
 
 ENV VERSION=4.5 \
   PDNS_guardian=yes \