diff --git a/README.md b/README.md
index 6129530..fc6f30d 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Options:
   --minimum_coverage INTEGER      Only consider SNP positions with a lest this
                                   coverage  [default: 30]
 
-  --minimum_base_quality INTEGER  Only count bases with a least this quality
+  --minimum_base_quality INTEGER  Only count bases with at least this quality
                                   [default: 1]
 
   --homozygosity_threshold FLOAT  Consider a SNP position homozygote if
diff --git a/src/snpahoy/client.py b/src/snpahoy/client.py
index 4e7f9a4..f903861 100644
--- a/src/snpahoy/client.py
+++ b/src/snpahoy/client.py
@@ -22,7 +22,7 @@ def get_counts(alignment: AlignmentFile, chromosome: str, position: int, minimum
 
 @click.group()
 @click.option('--minimum_coverage', default=30, show_default=True, help='Only consider SNP positions with a lest this coverage')
-@click.option('--minimum_base_quality', default=1, show_default=True, help='Only count bases with a least this quality')
+@click.option('--minimum_base_quality', default=1, show_default=True, help='Only count bases with at least this quality')
 @click.option('--homozygosity_threshold', default=0.95, show_default=True, help='Consider a SNP position homozygote if frequency of most common allele is this or higher')
 @click.pass_context
 def client(ctx, minimum_coverage, homozygosity_threshold, minimum_base_quality):