diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24d17bc6..859315c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## next
+
+- Bumped CSSTree to [`1.0.0-alpha.37`](https://github.com/csstree/csstree/releases/tag/v1.0.0-alpha.37) to fix source map generation inconsistency across node.js versions
+
 ## 4.0.0 (October 21, 2019)
 
 - Dropped support for Node < 8
diff --git a/package-lock.json b/package-lock.json
index 1a72bad2..9f3f5a52 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,6 +23,14 @@
         "jsesc": "^2.5.1",
         "lodash": "^4.17.13",
         "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
       }
     },
     "@babel/helper-function-name": {
@@ -482,12 +490,12 @@
       }
     },
     "css-tree": {
-      "version": "1.0.0-alpha.36",
-      "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-1.0.0-alpha.36.tgz",
-      "integrity": "sha512-AFAFvEOaB8NPmPtSIy1wVyD6K1bC8YBc07BYTCmeB3EbQUqKBU/TUIbJGSgDWbrHPX1a6QsJExx7rd6mzagK0w==",
+      "version": "1.0.0-alpha.37",
+      "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-1.0.0-alpha.37.tgz",
+      "integrity": "sha512-DMxWJg0rnz7UgxKT0Q1HU/L9BeJI0M6ksor0OgqOnF+aRCDWg/N2641HmVyU9KVIu0OVVWOb2IpC9A+BJRnejg==",
       "requires": {
         "mdn-data": "2.0.4",
-        "source-map": "^0.5.3"
+        "source-map": "^0.6.1"
       }
     },
     "dashdash": {
@@ -2070,9 +2078,9 @@
       }
     },
     "source-map": {
-      "version": "0.5.7",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
-      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
     },
     "source-map-support": {
       "version": "0.5.13",
diff --git a/package.json b/package.json
index f09c1c70..f1eab0e4 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "postpublish": "npm run gh-pages"
   },
   "dependencies": {
-    "css-tree": "1.0.0-alpha.36"
+    "css-tree": "1.0.0-alpha.37"
   },
   "devDependencies": {
     "coveralls": "^3.0.7",
@@ -69,7 +69,7 @@
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "source-map": "^0.5.6",
+    "source-map": "^0.6.1",
     "terser": "^4.3.8"
   },
   "engines": {