diff --git a/pyproject.toml b/pyproject.toml
index cece53b..123e858 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dependencies = [
     # Security scanning - Layer 3 NER-based PII detection (SPEC-009)
     "spacy>=3.8.0,<4.0.0",
     # Cron schedule parsing for evaluator-scheduler daemon (S-16.5, DEC-110)
-    "croniter>=2.0.0,<3.0.0",
+    "croniter>=2.0.0,<7.0.0",
     # LLM Observability — Langfuse tracing (SPEC-020, PLAN-008)
     "langfuse>=3.0,<4.0.0",
     # Auto-instrumentation for Anthropic SDK calls (SPEC-020 §6)
diff --git a/requirements.txt b/requirements.txt
index 3900ff1..186b2bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ detect-secrets>=1.4.0
 spacy>=3.8.0,<4.0.0
 
 # Cron schedule parsing for evaluator-scheduler daemon (S-16.5, DEC-110)
-croniter>=2.0.0,<3.0.0
+croniter>=2.0.0,<7.0.0
 
 # LLM Observability — Langfuse tracing (SPEC-020, PLAN-008)
 langfuse>=3.0,<4.0.0