diff --git a/README.md b/README.md
index fcf9d33..a0ad90e 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ environment variables is used in this image:
 * `OID_CLIENT_ID`: OpenID Client ID
 * `OID_CLIENT_SECRET`: OpenID Client Secret
 * `OIDC_AUTH_METHOD`: OpenID Connect authentication method (`client_secret_basic` or `client_secret_post`)
-* `OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY`: Enable silent renew of access token (`true` or `false`)
+* `OIDC_RENEW_ACCESS_TOKEN_ON_EXPIRY`: Enable silent renew of access token (`true` or `false`)
 
 * `PROXY_HOST`: Host name of the service to proxy
 * `PROXY_PORT`: Port of the service to proxy
diff --git a/nginx/conf/nginx.conf b/nginx/conf/nginx.conf
index ca23892..01c0530 100644
--- a/nginx/conf/nginx.conf
+++ b/nginx/conf/nginx.conf
@@ -15,6 +15,8 @@ env OID_CLIENT_SECRET;
 env OID_REDIRECT_PATH;
 env OIDC_AUTH_SCOPE;
 env OIDC_AUTH_METHOD;
+env OIDC_RENEW_ACCESS_TOKEN_ON_EXPIRY;
+# Keeping typo 'OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY' for backwards compatibility
 env OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY;
 env PROXY_HOST;
 env PROXY_PORT;
diff --git a/nginx/lua/auth.lua b/nginx/lua/auth.lua
index ee79f09..5ddad93 100644
--- a/nginx/lua/auth.lua
+++ b/nginx/lua/auth.lua
@@ -4,7 +4,8 @@ local opts = {
     client_id = os.getenv("OID_CLIENT_ID"),
     client_secret = os.getenv("OID_CLIENT_SECRET"),
     token_endpoint_auth_method = os.getenv("OIDC_AUTH_METHOD") or "client_secret_basic",
-    renew_access_token_on_expiry = os.getenv("OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY") ~= "false",
+    -- Backwards compatible with typo 'OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY'
+    renew_access_token_on_expiry = os.getenv("OIDC_RENEW_ACCESS_TOKEN_ON_EXPIRY") ~= "false" and os.getenv("OIDC_RENEW_ACCESS_TOKEN_ON_EXPIERY") ~= "false",
     scope = os.getenv("OIDC_AUTH_SCOPE") or "openid",
     iat_slack = 600,
 }