diff --git a/crates/zed/src/languages/css/config.toml b/crates/zed/src/languages/css/config.toml
index ba9660c4ed1f9b2de49558fc919e521d3f2f16f1..05de4be8a3fbe3b7e321ad6e3d335fbf7a1917c2 100644
--- a/crates/zed/src/languages/css/config.toml
+++ b/crates/zed/src/languages/css/config.toml
@@ -8,3 +8,4 @@ brackets = [
     { start = "\"", end = "\"", close = true, newline = false, not_in = ["string", "comment"] },
     { start = "'", end = "'", close = true, newline = false, not_in = ["string", "comment"] },
 ]
+word_characters = ["-"]
diff --git a/crates/zed/src/languages/html/config.toml b/crates/zed/src/languages/html/config.toml
index 077a421ce1b0e0375b56d2fc8cac48a601e03a65..164e095cee9a71f62531fc576c44f40a1c4e9260 100644
--- a/crates/zed/src/languages/html/config.toml
+++ b/crates/zed/src/languages/html/config.toml
@@ -10,3 +10,4 @@ brackets = [
     { start = "<", end = ">", close = true, newline = true, not_in = ["comment", "string"] },
     { start = "!--", end = " --", close = true, newline = false, not_in = ["comment", "string"] },
 ]
+word_characters = ["-"]