diff --git a/Dockerfile b/Dockerfile
index e624468..17f02b2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,7 +44,7 @@ RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local
 # DOWNLOAD AND INSTALL INVOICE NINJA
 #####
 
-ENV INVOICENINJA_VERSION 3.9.2
+ENV INVOICENINJA_VERSION 4.0.0
 
 RUN curl -o invoiceninja.tar.gz -SL https://github.com/hillelcoren/invoice-ninja/archive/v${INVOICENINJA_VERSION}.tar.gz \
     && tar -xzf invoiceninja.tar.gz -C /var/www/ \
diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 4552ab9..6409fc0 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -42,7 +42,7 @@ RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local
 # DOWNLOAD AND INSTALL INVOICE NINJA
 #####
 
-ENV INVOICENINJA_VERSION 3.9.2
+ENV INVOICENINJA_VERSION 4.0.0
 
 RUN curl -o invoiceninja.tar.gz -SL https://github.com/hillelcoren/invoice-ninja/archive/v${INVOICENINJA_VERSION}.tar.gz \
     && tar -xzf invoiceninja.tar.gz -C /var/www/ \