diff --git a/strkit/call/__init__.py b/strkit/call/__init__.py
index 90bc31a..66f2ad9 100644
--- a/strkit/call/__init__.py
+++ b/strkit/call/__init__.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from .allele import call_alleles
-from .caller import call_sample
+from .call_sample import call_sample
 
 __all__ = [
     "call_alleles",
diff --git a/strkit/call/caller/align_matrix.py b/strkit/call/align_matrix.py
similarity index 100%
rename from strkit/call/caller/align_matrix.py
rename to strkit/call/align_matrix.py
diff --git a/strkit/call/caller/call_locus.py b/strkit/call/call_locus.py
similarity index 100%
rename from strkit/call/caller/call_locus.py
rename to strkit/call/call_locus.py
diff --git a/strkit/call/caller/call_sample.py b/strkit/call/call_sample.py
similarity index 100%
rename from strkit/call/caller/call_sample.py
rename to strkit/call/call_sample.py
diff --git a/strkit/call/caller/__init__.py b/strkit/call/caller/__init__.py
deleted file mode 100644
index 743518d..0000000
--- a/strkit/call/caller/__init__.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from .call_sample import call_sample
-
-__all__ = [
-    "call_sample",
-]
diff --git a/strkit/call/caller/cigar.py b/strkit/call/cigar.py
similarity index 100%
rename from strkit/call/caller/cigar.py
rename to strkit/call/cigar.py
diff --git a/strkit/call/caller/non_daemonic_pool.py b/strkit/call/non_daemonic_pool.py
similarity index 100%
rename from strkit/call/caller/non_daemonic_pool.py
rename to strkit/call/non_daemonic_pool.py
diff --git a/strkit/call/caller/realign.py b/strkit/call/realign.py
similarity index 100%
rename from strkit/call/caller/realign.py
rename to strkit/call/realign.py
diff --git a/strkit/call/caller/repeats.py b/strkit/call/repeats.py
similarity index 100%
rename from strkit/call/caller/repeats.py
rename to strkit/call/repeats.py
diff --git a/strkit/call/caller/snvs.py b/strkit/call/snvs.py
similarity index 100%
rename from strkit/call/caller/snvs.py
rename to strkit/call/snvs.py
diff --git a/strkit/call/caller/types.py b/strkit/call/types.py
similarity index 100%
rename from strkit/call/caller/types.py
rename to strkit/call/types.py
diff --git a/strkit/call/caller/utils.py b/strkit/call/utils.py
similarity index 100%
rename from strkit/call/caller/utils.py
rename to strkit/call/utils.py
diff --git a/tests/test_caller_utils.py b/tests/test_caller_utils.py
index 33966c7..aa83e29 100644
--- a/tests/test_caller_utils.py
+++ b/tests/test_caller_utils.py
@@ -1,4 +1,4 @@
-from strkit.call.caller.utils import find_pair_by_ref_pos_py, find_pair_by_ref_pos, normalize_contig, round_to_base_pos
+from strkit.call.utils import find_pair_by_ref_pos_py, find_pair_by_ref_pos, normalize_contig, round_to_base_pos
 
 #         A  A       T  T       C  G       C  C       C  C       A  A       A  A       A  C
 PAIRS = [(0, 1000), (1, 1001), (2, 1003), (3, 1004), (4, 1005), (5, 1006), (6, 1008), (7, 1009)]