diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c00850..ca9ceb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,15 @@
+0.19.0 / 2021-12-20
+===================
+
+* **[Enhancement]**: Add a negative autocompletion boost to some trigonometric functions that can overlap with other more popular PromQL functions.
+* **[BugFix]**: Improve checking of whether a `PrometheusConfig` object was passed to `newCompleteStrategy()`.
+
 0.18.0 / 2021-10-20
 ===================
 
 * **[Feature]**: Allow overriding the API prefix used to contact a remote Prometheus.
 * **[Feature]**: Add linter and autocompletion support for trigonometric functions (like `sin`, `cos`)
-* **[BreakingChange]**: The lib is now exposed under the `dist` folder. When importing `codemirror-promql`, it means you 
+* **[BreakingChange]**: The lib is now exposed under the `dist` folder. When importing `codemirror-promql`, it means you
 will need to add `dist` in the import. For example `import { newCompleteStrategy } from 'codemirror-promql/cjs/complete';`
 becomes `import { newCompleteStrategy } from 'codemirror-promql/dist/cjs/complete';`
 * **[BreakingChange]**: lezer-promql has been migrated into codemirror-promql in the `grammar` folder
@@ -22,8 +28,8 @@ becomes `import { newCompleteStrategy } from 'codemirror-promql/dist/cjs/complet
   name. (#142)
 * **[Feature]**: Autocomplete `NaN` and `Inf` (#141)
 * **[Enhancement]**: Fetch series using the HTTP `POST` method (#139)
-* **[Enhancement]**: Upgrade lezer-promql that fixed the parsing of metric names starting with `Inf`/`NaN` like infra (#142)  
-* **[BreakingChange]**: The constant `promQLLanguage` has been changed to be a function. It takes a `LanguageType` as a 
+* **[Enhancement]**: Upgrade lezer-promql that fixed the parsing of metric names starting with `Inf`/`NaN` like infra (#142)
+* **[BreakingChange]**: The constant `promQLLanguage` has been changed to be a function. It takes a `LanguageType` as a
   parameter (#142)
 
 0.15.0 / 2021-04-13
diff --git a/package.json b/package.json
index 2d65c05..0cd0d7e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codemirror-promql",
-  "version": "0.18.0",
+  "version": "0.19.0",
   "description": "a CodeMirror mode for the PromQL language",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
@@ -41,7 +41,8 @@
     "@codemirror/lint": "^0.19.3",
     "@codemirror/state": "^0.19.6",
     "@codemirror/view": "^0.19.27",
-    "@lezer/common": "^0.15.10",
+    "@lezer/common": "^0.15.11",
+    "@lezer/lr": "^0.15.5",
     "@lezer/generator": "^0.15.2",
     "@types/chai": "^4.2.22",
     "@types/lru-cache": "^5.1.1",
@@ -73,7 +74,7 @@
     "@codemirror/lint": "^0.19.3",
     "@codemirror/state": "^0.19.6",
     "@codemirror/view": "^0.19.27",
-    "@lezer/common": "^0.15.10"
+    "@lezer/common": "^0.15.11"
   },
   "prettier": {
     "singleQuote": true,
diff --git a/src/complete/hybrid.ts b/src/complete/hybrid.ts
index 8e1c3d4..f9a31ba 100644
--- a/src/complete/hybrid.ts
+++ b/src/complete/hybrid.ts
@@ -342,7 +342,7 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode): Context
       }
       break;
     case PromQL:
-      if (!node.firstChild) {
+      if (node.firstChild !== null && node.firstChild.type.id === 0) {
         // this situation can happen when there is nothing in the text area and the user is explicitly triggering the autocompletion (with ctrl + space)
         result.push(
           { kind: ContextKind.MetricName, metricName: '' },