diff --git a/nginx.tmpl b/nginx.tmpl
index 2df2199..8e6d576 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -15,14 +15,14 @@
 {{- $config := dict }}
 {{- $_ := set $config "nginx_proxy_version" $.Env.NGINX_PROXY_VERSION }}
 {{- $_ := set $config "default_cert_ok" (and (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
-{{- $_ := set $config "external_http_port" (coalesce $globals.Env.HTTP_PORT "80") }}
-{{- $_ := set $config "external_https_port" (coalesce $globals.Env.HTTPS_PORT "443") }}
-{{- $_ := set $config "sha1_upstream_name" (parseBool (coalesce $globals.Env.SHA1_UPSTREAM_NAME "false")) }}
-{{- $_ := set $config "default_root_response" (coalesce $globals.Env.DEFAULT_ROOT "404") }}
-{{- $_ := set $config "trust_downstream_proxy" (parseBool (coalesce $globals.Env.TRUST_DOWNSTREAM_PROXY "true")) }}
+{{- $_ := set $config "external_http_port" ($globals.Env.HTTP_PORT | default "80") }}
+{{- $_ := set $config "external_https_port" ($globals.Env.HTTPS_PORT | default "443") }}
+{{- $_ := set $config "sha1_upstream_name" ($globals.Env.SHA1_UPSTREAM_NAME | default "false" | parseBool) }}
+{{- $_ := set $config "default_root_response" ($globals.Env.DEFAULT_ROOT | default "404") }}
+{{- $_ := set $config "trust_downstream_proxy" ($globals.Env.TRUST_DOWNSTREAM_PROXY | default "true" | parseBool) }}
 {{- $_ := set $config "enable_access_log" ($globals.Env.DISABLE_ACCESS_LOGS | default "false" | parseBool | not) }}
-{{- $_ := set $config "enable_ipv6" (parseBool (coalesce $globals.Env.ENABLE_IPV6 "false")) }}
-{{- $_ := set $config "ssl_policy" (or ($globals.Env.SSL_POLICY) "Mozilla-Intermediate") }}
+{{- $_ := set $config "enable_ipv6" ($globals.Env.ENABLE_IPV6 | default "false" | parseBool) }}
+{{- $_ := set $config "ssl_policy" ($globals.Env.SSL_POLICY | default "Mozilla-Intermediate") }}
 {{- $_ := set $config "enable_debug_endpoint" ($globals.Env.DEBUG_ENDPOINT | default "false") }}
 {{- $_ := set $config "hsts" ($globals.Env.HSTS | default "max-age=31536000") }}
 {{- $_ := set $config "acme_http_challenge" ($globals.Env.ACME_HTTP_CHALLENGE_LOCATION | default "true") }}