diff --git a/docs/public/presets/toml/plain-text-symbols.toml b/docs/public/presets/toml/plain-text-symbols.toml
index 48e9e6ebd..f5b47fd02 100644
--- a/docs/public/presets/toml/plain-text-symbols.toml
+++ b/docs/public/presets/toml/plain-text-symbols.toml
@@ -34,6 +34,9 @@ symbol = "cobol "
 [conda]
 symbol = "conda "
 
+[container]
+symbol = "container "
+
 [crystal]
 symbol = "cr "
 
@@ -88,6 +91,12 @@ symbol = "gradle "
 [guix_shell]
 symbol = "guix "
 
+[haskell]
+symbol = "haskell "
+
+[helm]
+symbol = "helm "
+
 [hg_branch]
 symbol = "hg "