diff --git a/prymer/offtarget/offtarget_detector.py b/prymer/offtarget/offtarget_detector.py
index 89aaf37..ccd7bfb 100644
--- a/prymer/offtarget/offtarget_detector.py
+++ b/prymer/offtarget/offtarget_detector.py
@@ -231,9 +231,7 @@ def __init__(
         """
         errors: list[str] = []
         if max_amplicon_size < 1:
-            errors.append(
-                f"'max_amplicon_size' must be greater than or equal to 1. Saw {max_amplicon_size}"
-            )
+            errors.append(f"'max_amplicon_size' must be greater than 0. Saw {max_amplicon_size}")
         if max_primer_hits < 0:
             errors.append(
                 f"'max_primer_hits' must be greater than or equal to 0. Saw {max_primer_hits}"
@@ -250,7 +248,7 @@ def __init__(
             )
         if three_prime_region_length < 1:
             errors.append(
-                "'three_prime_region_length' must be greater than or equal to 1. "
+                "'three_prime_region_length' must be greater than 0. "
                 f"Saw {three_prime_region_length}"
             )
         if (
@@ -259,7 +257,7 @@ def __init__(
         ):
             errors.append(
                 "'max_mismatches_in_three_prime_region' must be between 0 and "
-                f"{three_prime_region_length}, inclusive. "
+                f"{three_prime_region_length} inclusive. "
                 f"Saw {max_mismatches_in_three_prime_region}"
             )
         if max_mismatches < 0: