diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f3daa41..f975db9 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@ exclude: tests/(data|__snapshots__|samples)
 
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.6.0
+  rev: v5.0.0
   hooks:
   - id: trailing-whitespace
   - id: end-of-file-fixer
@@ -10,7 +10,7 @@ repos:
   - id: check-added-large-files
 
 - repo: https://github.com/PyCQA/pylint
-  rev: v3.2.7
+  rev: v3.3.1
   hooks:
   - id: pylint
     additional_dependencies:
@@ -21,17 +21,17 @@ repos:
       - "tree-sitter-zeek==0.1.1"
 
 - repo: https://github.com/psf/black
-  rev: 24.8.0
+  rev: 24.10.0
   hooks:
   - id: black
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v3.17.0
+  rev: v3.19.0
   hooks:
   - id: pyupgrade
     args: ["--py37-plus"]
 
 - repo: https://github.com/igorshubovych/markdownlint-cli
-  rev: v0.41.0
+  rev: v0.42.0
   hooks:
   - id: markdownlint-fix
diff --git a/.pylintrc b/.pylintrc
index 1498408..533e7ff 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -8,4 +8,5 @@ disable=
   too-many-branches,
   too-many-instance-attributes,
   too-many-lines,
+  too-many-positional-arguments,
   too-many-statements,
diff --git a/pyproject.toml b/pyproject.toml
index e720caa..254dc38 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,11 +24,11 @@ keywords = [
     "parsing",
 ]
 
-requires-python = ">=3.9"
+requires-python = ">= 3.9"
 
 dependencies = [
     "tree-sitter==0.23.2",
-    "tree-sitter-zeek==0.1.1",
+    "tree-sitter-zeek==0.2.1",
 ]
 
 [project.optional-dependencies]
diff --git a/tests/__snapshots__/test_samples/test_samples[sample0][testssamplestest1.zeek].raw b/tests/__snapshots__/test_samples/test_samples[sample0][testssamplestest1.zeek].raw
index 4cb187a..e82496b 100644
--- a/tests/__snapshots__/test_samples/test_samples[sample0][testssamplestest1.zeek].raw
+++ b/tests/__snapshots__/test_samples/test_samples[sample0][testssamplestest1.zeek].raw
@@ -206,3 +206,10 @@ function comments()
 
 function no_comments()
 	{ }
+
+# Assert.
+function foo()
+	{
+	assert 1 == 2, "One is not two";
+	assert 1 == 1;
+	}
diff --git a/tests/samples/test1.zeek b/tests/samples/test1.zeek
index f32711a..bab5999 100644
--- a/tests/samples/test1.zeek
+++ b/tests/samples/test1.zeek
@@ -173,4 +173,9 @@ function no_comments()
        {
        }
 
+# Assert.
+function foo() {
+assert 1 == 2, "One is not two";
+assert 1 == 1;
+}
 
diff --git a/zeekscript/formatter.py b/zeekscript/formatter.py
index 48416f1..bbbea2b 100644
--- a/zeekscript/formatter.py
+++ b/zeekscript/formatter.py
@@ -1027,6 +1027,12 @@ def format(self):
             self._format_child()  # <preproc_directive>
             self._write_nl()
 
+        elif start_token == "assert":
+            self._format_child()  # 'assert'
+            self._write_sp()
+            self._format_children()
+            self._write_nl()
+
         elif start_token == ";":
             self._format_child(hints=Hint.NO_LB_BEFORE)  # ';'
             self._write_nl()
@@ -1087,6 +1093,10 @@ def format(self):
         self._format_child(hints=Hint.NO_LB_BEFORE)  # ')'
 
 
+class AssertMsgFormatter(SpaceSeparatedFormatter):
+    pass
+
+
 class ExprFormatter(SpaceSeparatedFormatter, ComplexSequenceFormatterMixin):
     # Like statments, expressions aren't currently broken into specific symbol
     # types, so we use helpers or parse into them to identify what particular