diff --git a/changelog.xml b/changelog.xml
index eebd1433..2aaba428 100644
--- a/changelog.xml
+++ b/changelog.xml
@@ -34,6 +34,9 @@
       <action type="fix" issue="#134">
         Fix false positives when using siunitx (LaTeX)
       </action>
+      <action type="fix" issue="#156">
+        Fix unquoted languages in YAML front matter not parsed correctly
+      </action>
       <action type="fix" issue="#178" due-to="Stanley F (@sfo)">
         Fix plural dummy in German languages
       </action>
diff --git a/src/main/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizer.kt b/src/main/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizer.kt
index 471663c8..f9502dc0 100644
--- a/src/main/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizer.kt
+++ b/src/main/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizer.kt
@@ -52,8 +52,8 @@ class MarkdownFragmentizer(codeLanguageId: String) : CodeFragmentizer(codeLangua
 
   companion object {
     private val YAML_FRONT_MATTER_REGEX = Regex(
-      "\\A---[ \t]*$.*?^lang:[ \t]+(?:\"(.+)\"|'(.+)'|(.+))$.*?^---[ \t]*$",
-      setOf(RegexOption.MULTILINE, RegexOption.DOT_MATCHES_ALL),
+      "\\A---[ \t]*$(?s).*?(?-s)^lang:[ \t]+(?:\"(.+)\"|'(.+)'|(.+))$(?s).*?(?-s)^---[ \t]*$",
+      RegexOption.MULTILINE,
     )
 
     private val COMMENT_REGEX = Regex(
diff --git a/src/test/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizerTest.kt b/src/test/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizerTest.kt
index 3869ee2e..1f7d5a20 100644
--- a/src/test/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizerTest.kt
+++ b/src/test/kotlin/org/bsplines/ltexls/parsing/markdown/MarkdownFragmentizerTest.kt
@@ -47,6 +47,7 @@ class MarkdownFragmentizerTest {
       """
       ---
       lang: 'de-DE'
+      abc: def
       ---
 
       This is a test.
@@ -61,6 +62,7 @@ class MarkdownFragmentizerTest {
       """
       ---
       lang: de-DE
+      abc: def
       ---
 
       This is a test.