diff --git a/resources/META-INF/plugin.xml b/resources/META-INF/plugin.xml
index a518518..891bf58 100644
--- a/resources/META-INF/plugin.xml
+++ b/resources/META-INF/plugin.xml
@@ -1,9 +1,14 @@
 <idea-plugin url="https://github.com/koxudaxi/poetry-pycharm-plugin" require-restart="true">
     <id>com.koxudaxi.poetry</id>
     <name>Poetry</name>
-    <version>1.0.4</version>
+    <version>1.0.5</version>
     <vendor email="koaxudai@gmail.com">Koudai Aono @koxudaxi</vendor>
     <change-notes><![CDATA[
+    <h2>version 1.0.5</h2>
+    <p>Bug fixes</p>
+    <ul>
+        <li>Support Toml plugin version 0.2.139.3615-203 or earlier version [#174]</li>
+    </ul>
     <h2>version 1.0.4</h2>
     <p>Bug fixes</p>
     <ul>
diff --git a/src/com/koxudaxi/poetry/PoetryExtrasLineMarkerContributor.kt b/src/com/koxudaxi/poetry/PoetryExtrasLineMarkerContributor.kt
index a07ae73..e7da86c 100644
--- a/src/com/koxudaxi/poetry/PoetryExtrasLineMarkerContributor.kt
+++ b/src/com/koxudaxi/poetry/PoetryExtrasLineMarkerContributor.kt
@@ -17,8 +17,8 @@ object PoetryExtrasLineMarkerContributor : RunLineMarkerContributor() {
             return null //Toml plugin is installed. But, PyCharm has not restarted yet.
         }
         val keyValue = element.parent as? TomlKeyValue ?: return null
-        val key = (keyValue.parent as? TomlTable)?.header?.key ?: return null
-        if (key.text != "tool.poetry.extras") return null
+        val header = (keyValue.parent as? TomlTable)?.header ?: return null
+        if (header.keyText != "tool.poetry.extras") return null
         if (keyValue.key.text == null) return null
         val value = keyValue.value as? TomlArray ?: return null
         if (value.elements.isEmpty() || value.elements.any { it !is TomlLiteral || it.textLength < 3}) return null
diff --git a/src/com/koxudaxi/poetry/PoetryScriptsLineMarkerContributor.kt b/src/com/koxudaxi/poetry/PoetryScriptsLineMarkerContributor.kt
index 31d7645..27caeb8 100644
--- a/src/com/koxudaxi/poetry/PoetryScriptsLineMarkerContributor.kt
+++ b/src/com/koxudaxi/poetry/PoetryScriptsLineMarkerContributor.kt
@@ -21,8 +21,8 @@ object PoetryScriptsLineMarkerContributor : RunLineMarkerContributor() {
             return null //Toml plugin is installed. But, PyCharm has not restarted yet.
         }
         val keyValue = element.parent as? TomlKeyValue ?: return null
-        val key = (keyValue.parent as? TomlTable)?.header?.key ?: return null
-        if (key.text != "tool.poetry.scripts") return null
+        val header = (keyValue.parent as? TomlTable)?.header ?: return null
+        if (header.keyText != "tool.poetry.scripts") return null
         if (keyValue.key.text == null) return null
         val value = keyValue.value as? TomlLiteral ?: return null
         if (value.textLength < 3) return null
diff --git a/src/com/koxudaxi/poetry/PoetryVersionInspection.kt b/src/com/koxudaxi/poetry/PoetryVersionInspection.kt
index 9aefdea..c381fe1 100644
--- a/src/com/koxudaxi/poetry/PoetryVersionInspection.kt
+++ b/src/com/koxudaxi/poetry/PoetryVersionInspection.kt
@@ -32,7 +32,7 @@ class PoetryVersionInspection : LocalInspectionTool() {
             if (file.virtualFile != module.pyProjectToml) return
             file.children
                     .filter { element ->
-                        (element as? TomlTable)?.header?.key?.text in listOf("tool.poetry.dependencies", "tool.poetry.dev-dependencies")
+                        (element as? TomlTable)?.header?.keyText in listOf("tool.poetry.dependencies", "tool.poetry.dev-dependencies")
                     }.flatMap {
                         it.children.mapNotNull { line -> line as? TomlKeyValue }
                     }.forEach { keyValue ->
diff --git a/src/com/koxudaxi/poetry/poetry.kt b/src/com/koxudaxi/poetry/poetry.kt
index dfbf314..516500a 100644
--- a/src/com/koxudaxi/poetry/poetry.kt
+++ b/src/com/koxudaxi/poetry/poetry.kt
@@ -62,11 +62,14 @@ import org.apache.tuweni.toml.TomlParseResult
 import org.apache.tuweni.toml.TomlTable
 import org.jetbrains.annotations.SystemDependent
 import org.jetbrains.annotations.TestOnly
+import org.toml.lang.psi.TomlKey
+import org.toml.lang.psi.TomlTableHeader
 import java.io.File
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.TimeoutException
 import java.util.function.Supplier
 import java.util.regex.Pattern
+import kotlin.reflect.full.memberProperties
 
 const val PY_PROJECT_TOML: String = "pyproject.toml"
 const val POETRY_LOCK: String = "poetry.lock"
@@ -712,4 +715,27 @@ fun parsePoetryShowOutdated(input: String): Map<String, PoetryOutdatedVersion> {
 
 data class PoetryOutdatedVersion(
         @SerializedName("currentVersion") var currentVersion: String,
-        @SerializedName("latestVersion") var latestVersion: String)
\ No newline at end of file
+        @SerializedName("latestVersion") var latestVersion: String)
+
+
+private fun tomlTableHeaderHasKey(): Boolean = TomlTableHeader::class.memberProperties.any { it.name == "key" }
+var tomlTableHeaderHasKeyCache: Boolean = tomlTableHeaderHasKey()
+val TomlTableHeader.keyText: String? get() = getKeyByTomlTableHeader(this)
+
+
+private fun getKeyByTomlTableHeader(header: TomlTableHeader): String? {
+    return try {
+        when {
+            tomlTableHeaderHasKeyCache -> header.key?.text
+            else -> (header::class.java.getMethod("getNames").invoke(header) as? List<*>)
+                ?.filterIsInstance<TomlKey>()?.joinToString(".") { it.text }
+        }
+    } catch (e: Exception) {
+        val updatedTomlTableHeaderHasKey = tomlTableHeaderHasKey()
+        if (updatedTomlTableHeaderHasKey == tomlTableHeaderHasKeyCache) {
+            throw Exception("unsupported TomlTableHeader type")
+        }
+        tomlTableHeaderHasKeyCache = updatedTomlTableHeaderHasKey
+        getKeyByTomlTableHeader(header)
+    }
+}