diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,4 +11,5 @@
 force_sort_within_sections = true
 
 [build-system]
-requires = ["setuptools", "wheel", "tree_sitter"]
+# the tree_sitter version must match the versions declared in the requirements.txt and setup.py files
+requires = ["setuptools", "wheel", "tree_sitter==0.20.0"]
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,6 @@
 click
 elasticsearch>=7.0.0,<8.0.0
 typing-extensions
-tree_sitter
+# must match the versions declared. in pyproject.toml and setup.py files
+tree_sitter==0.20.0
 iso8601
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -159,7 +159,9 @@
         [swh.cli.subcommands]
         search=swh.search.cli
     """,
-    setup_requires=["setuptools-scm", "tree-sitter==0.19.0"],
+    # the tree-sitter version must match the versions declared in
+    # requirements.txt and project.toml files
+    setup_requires=["setuptools-scm", "tree-sitter==0.20.0"],
     use_scm_version=True,
     extras_require={"testing": parse_requirements("test")},
     include_package_data=True,
diff --git a/yarn.lock b/yarn.lock
--- a/yarn.lock
+++ b/yarn.lock
@@ -3,11 +3,11 @@
 
 
 nan@^2.14.2:
-  version "2.14.2"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.2.tgz#f5376400695168f4cc694ac9393d0c9585eeea19"
-  integrity sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.15.0.tgz#3f34a473ff18e15c1b5626b62903b5ad6e665fee"
+  integrity sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ==
 
 tree-sitter-cli@^0.20.0:
-  version "0.20.0"
-  resolved "https://registry.yarnpkg.com/tree-sitter-cli/-/tree-sitter-cli-0.20.0.tgz#feaaa11c7ecf44a6e236aa1e2963b85d045d33cc"
-  integrity sha512-4D1qapWbJXZ5rrSUGM5rcw5Vuq/smzn9KbiFRhlON6KeuuXjra+KAtDYVrDgAoLIG4ku+jbEEGrJxCptUGi3dg==
+  version "0.20.1"
+  resolved "https://registry.yarnpkg.com/tree-sitter-cli/-/tree-sitter-cli-0.20.1.tgz#9c6f1c79fd87d2a73a232dbceae673240741d785"
+  integrity sha512-I0Gp4ThRp39TDnBAaZKiogvoE85MSeL6/ILZMXbzeEo8hUsudpVhEHRE4CU+Bk5QUaiMiDkD+ZIL3gT2zZ++wg==