diff --git a/CHANGELOG.md b/CHANGELOG.md
index 86f68b0..3d671bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- "sed: write error" for large values of `EXIT_NODES` and `EXCLUDE_EXIT_NODES`
 
 ## [4.5.0] - 2021-09-06
 ### Added
diff --git a/entrypoint.sh b/entrypoint.sh
index 2bcab83..6619e95 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -20,15 +20,14 @@ else
     sed -e "s/{socks_timeout_seconds}/$SOCKS_TIMEOUT_SECONDS/" /torrc.template > /tmp/torrc
 fi
 
-if [ -z "$EXIT_NODES" ]; then
-    sed --in-place -e '/{exit_nodes}/d' /tmp/torrc
-else
-    sed --in-place -e "s#{exit_nodes}#$EXIT_NODES#" /tmp/torrc
+# > list of identity fingerprints, country codes, and address patterns
+if [ ! -z "$EXIT_NODES" ]; then
+    echo -n 'ExitNodes ' >> /tmp/torrc
+    printenv EXIT_NODES >> /tmp/torrc
 fi
-if [ -z "$EXCLUDE_EXIT_NODES" ]; then
-    sed --in-place -e '/{exclude_exit_nodes}/d' /tmp/torrc
-else
-    sed --in-place -e "s#{exclude_exit_nodes}#$EXCLUDE_EXIT_NODES#" /tmp/torrc
+if [ ! -z "$EXCLUDE_EXIT_NODES" ]; then
+    echo -n 'ExcludeExitNodes ' >> /tmp/torrc
+    printenv EXCLUDE_EXIT_NODES >> /tmp/torrc
 fi
 
 exec "$@"
diff --git a/torrc.template b/torrc.template
index cff7c59..5c79cef 100644
--- a/torrc.template
+++ b/torrc.template
@@ -26,9 +26,5 @@ SocksTimeout {socks_timeout_seconds}
 # https://github.com/mitmproxy/mitmproxy/blob/v6.0.2/mitmproxy/platform/linux.py#L27
 TransPort 0.0.0.0:9040 IsolateClientAddr IsolateClientProtocol
 
-# > list of identity fingerprints, country codes, and address patterns
-ExitNodes {exit_nodes}
-ExcludeExitNodes {exclude_exit_nodes}
-
 # try to
 HardwareAccel 1