diff --git a/toolbx/Dockerfile b/toolbx/Dockerfile
index 85c975cf7fd3b7da514413b65b06f3481bffecbd..f69f8322cbb5a5d831e0138a5ff3d5734dc03b7d 100644
--- a/toolbx/Dockerfile
+++ b/toolbx/Dockerfile
@@ -33,6 +33,8 @@ RUN rm /etc/apt/apt.conf.d/docker-* && \
     gpg --no-default-keyring --import --batch --keyring /usr/share/keyrings/cloudposse.gpg && \
     curl https://repo.charm.sh/apt/gpg.key | \
     gpg --no-default-keyring --import --batch --keyring /usr/share/keyrings/charm.gpg && \
+    curl https://packages.opentofu.org/opentofu/tofu/gpgkey | \
+    gpg --no-default-keyring --import --batch --keyring /usr/share/keyrings/opentofu.gpg && \
     gpg --no-default-keyring --keyring /usr/share/keyrings/clickhouse.gpg --keyserver hkp://keyserver.ubuntu.com:80  --recv-keys 8919F6BD2B48D754 && \
     ln --symbolic --target /usr/local/bin/ /usr/libexec/flatpak-xdg-utils/* && \
     ln --symbolic /usr/local/bin/host-spawn /usr/local/bin/podman && \
diff --git a/toolbx/sources.d/opentofu.sources b/toolbx/sources.d/opentofu.sources
new file mode 100644
index 0000000000000000000000000000000000000000..9ea032e9f6a3738dd207e30b60f98312fc1ee09f
--- /dev/null
+++ b/toolbx/sources.d/opentofu.sources
@@ -0,0 +1,5 @@
+Types: deb deb-src
+URIs: https://packages.opentofu.org/opentofu/tofu/any/
+Suites: any
+Components: main
+Signed-By: /usr/share/keyrings/opentofu.gpg