diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..c0af933
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+erlang 21.3.8
diff --git a/Dockerfile b/Dockerfile
index 56435e1..7a9d07e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -53,8 +53,8 @@ WORKDIR /opt/erlang/epp_proxy
 
 COPY .tool-versions ./
 RUN asdf plugin-add erlang
-RUN asdf plugin-add rebar
 RUN asdf install
+
 RUN curl https://s3.amazonaws.com/rebar3/rebar3 -o /rebar3
 RUN mv /rebar3 /usr/local/bin
 RUN chmod +x /usr/local/bin/rebar3
diff --git a/README.md b/README.md
index fa97494..5fe1f6a 100644
--- a/README.md
+++ b/README.md
@@ -95,8 +95,4 @@ Checklist of steps to perform if you want to migrate from mod_epp, but still use
 TODO
 ----
 
-1. DONE -- Add syslog logger
-2. DONE -- Add default error responses for errors while contacting registry and for invalid XML.
-3. DONE -- This readme.
-4. DONE -- Migration guide for mod epp.
-5. Ensure CRL gets updated periodically without a need for restart of the service
+1. Ensure CRL gets updated periodically without a need for restart of the service