diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2cf343c..faef5f6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -13,7 +13,7 @@ Change Log
   - updated bitarray: ">=1.2.0" -> "^2.9.2"
   - updated h5py: ">=2.10.0" -> "^3.11.0"
   - updated matplotlib: "==3.3.4" -> "^3.9.0"
-  - udpated numpy: ">=1.18.0" -> "^2.0.0"
+  - udpated numpy: ">=1.18.0" -> "^1.26.4"
   - updated pysam ">=0.15.0" -> "^0.22.1"
   - updated pytabix: ">=0.0.2" -> "^0.1"
 
diff --git a/poetry.lock b/poetry.lock
index 2779652..8b9d8fa 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -529,56 +529,47 @@ dev = ["meson-python (>=0.13.1)", "numpy (>=1.25)", "pybind11 (>=2.6)", "setupto
 
 [[package]]
 name = "numpy"
-version = "2.0.0"
+version = "1.26.4"
 description = "Fundamental package for array computing in Python"
 optional = false
 python-versions = ">=3.9"
 files = [
-    {file = "numpy-2.0.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:04494f6ec467ccb5369d1808570ae55f6ed9b5809d7f035059000a37b8d7e86f"},
-    {file = "numpy-2.0.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:2635dbd200c2d6faf2ef9a0d04f0ecc6b13b3cad54f7c67c61155138835515d2"},
-    {file = "numpy-2.0.0-cp310-cp310-macosx_14_0_arm64.whl", hash = "sha256:0a43f0974d501842866cc83471bdb0116ba0dffdbaac33ec05e6afed5b615238"},
-    {file = "numpy-2.0.0-cp310-cp310-macosx_14_0_x86_64.whl", hash = "sha256:8d83bb187fb647643bd56e1ae43f273c7f4dbcdf94550d7938cfc32566756514"},
-    {file = "numpy-2.0.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:79e843d186c8fb1b102bef3e2bc35ef81160ffef3194646a7fdd6a73c6b97196"},
-    {file = "numpy-2.0.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6d7696c615765091cc5093f76fd1fa069870304beaccfd58b5dcc69e55ef49c1"},
-    {file = "numpy-2.0.0-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:b4c76e3d4c56f145d41b7b6751255feefae92edbc9a61e1758a98204200f30fc"},
-    {file = "numpy-2.0.0-cp310-cp310-musllinux_1_2_aarch64.whl", hash = "sha256:acd3a644e4807e73b4e1867b769fbf1ce8c5d80e7caaef0d90dcdc640dfc9787"},
-    {file = "numpy-2.0.0-cp310-cp310-win32.whl", hash = "sha256:cee6cc0584f71adefe2c908856ccc98702baf95ff80092e4ca46061538a2ba98"},
-    {file = "numpy-2.0.0-cp310-cp310-win_amd64.whl", hash = "sha256:ed08d2703b5972ec736451b818c2eb9da80d66c3e84aed1deeb0c345fefe461b"},
-    {file = "numpy-2.0.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:ad0c86f3455fbd0de6c31a3056eb822fc939f81b1618f10ff3406971893b62a5"},
-    {file = "numpy-2.0.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:e7f387600d424f91576af20518334df3d97bc76a300a755f9a8d6e4f5cadd289"},
-    {file = "numpy-2.0.0-cp311-cp311-macosx_14_0_arm64.whl", hash = "sha256:34f003cb88b1ba38cb9a9a4a3161c1604973d7f9d5552c38bc2f04f829536609"},
-    {file = "numpy-2.0.0-cp311-cp311-macosx_14_0_x86_64.whl", hash = "sha256:b6f6a8f45d0313db07d6d1d37bd0b112f887e1369758a5419c0370ba915b3871"},
-    {file = "numpy-2.0.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:5f64641b42b2429f56ee08b4f427a4d2daf916ec59686061de751a55aafa22e4"},
-    {file = "numpy-2.0.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:a7039a136017eaa92c1848152827e1424701532ca8e8967fe480fe1569dae581"},
-    {file = "numpy-2.0.0-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:46e161722e0f619749d1cd892167039015b2c2817296104487cd03ed4a955995"},
-    {file = "numpy-2.0.0-cp311-cp311-musllinux_1_2_aarch64.whl", hash = "sha256:0e50842b2295ba8414c8c1d9d957083d5dfe9e16828b37de883f51fc53c4016f"},
-    {file = "numpy-2.0.0-cp311-cp311-win32.whl", hash = "sha256:2ce46fd0b8a0c947ae047d222f7136fc4d55538741373107574271bc00e20e8f"},
-    {file = "numpy-2.0.0-cp311-cp311-win_amd64.whl", hash = "sha256:fbd6acc766814ea6443628f4e6751d0da6593dae29c08c0b2606164db026970c"},
-    {file = "numpy-2.0.0-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:354f373279768fa5a584bac997de6a6c9bc535c482592d7a813bb0c09be6c76f"},
-    {file = "numpy-2.0.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:4d2f62e55a4cd9c58c1d9a1c9edaedcd857a73cb6fda875bf79093f9d9086f85"},
-    {file = "numpy-2.0.0-cp312-cp312-macosx_14_0_arm64.whl", hash = "sha256:1e72728e7501a450288fc8e1f9ebc73d90cfd4671ebbd631f3e7857c39bd16f2"},
-    {file = "numpy-2.0.0-cp312-cp312-macosx_14_0_x86_64.whl", hash = "sha256:84554fc53daa8f6abf8e8a66e076aff6ece62de68523d9f665f32d2fc50fd66e"},
-    {file = "numpy-2.0.0-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c73aafd1afca80afecb22718f8700b40ac7cab927b8abab3c3e337d70e10e5a2"},
-    {file = "numpy-2.0.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:49d9f7d256fbc804391a7f72d4a617302b1afac1112fac19b6c6cec63fe7fe8a"},
-    {file = "numpy-2.0.0-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:0ec84b9ba0654f3b962802edc91424331f423dcf5d5f926676e0150789cb3d95"},
-    {file = "numpy-2.0.0-cp312-cp312-musllinux_1_2_aarch64.whl", hash = "sha256:feff59f27338135776f6d4e2ec7aeeac5d5f7a08a83e80869121ef8164b74af9"},
-    {file = "numpy-2.0.0-cp312-cp312-win32.whl", hash = "sha256:c5a59996dc61835133b56a32ebe4ef3740ea5bc19b3983ac60cc32be5a665d54"},
-    {file = "numpy-2.0.0-cp312-cp312-win_amd64.whl", hash = "sha256:a356364941fb0593bb899a1076b92dfa2029f6f5b8ba88a14fd0984aaf76d0df"},
-    {file = "numpy-2.0.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:e61155fae27570692ad1d327e81c6cf27d535a5d7ef97648a17d922224b216de"},
-    {file = "numpy-2.0.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:4554eb96f0fd263041baf16cf0881b3f5dafae7a59b1049acb9540c4d57bc8cb"},
-    {file = "numpy-2.0.0-cp39-cp39-macosx_14_0_arm64.whl", hash = "sha256:903703372d46bce88b6920a0cd86c3ad82dae2dbef157b5fc01b70ea1cfc430f"},
-    {file = "numpy-2.0.0-cp39-cp39-macosx_14_0_x86_64.whl", hash = "sha256:3e8e01233d57639b2e30966c63d36fcea099d17c53bf424d77f088b0f4babd86"},
-    {file = "numpy-2.0.0-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:1cde1753efe513705a0c6d28f5884e22bdc30438bf0085c5c486cdaff40cd67a"},
-    {file = "numpy-2.0.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:821eedb7165ead9eebdb569986968b541f9908979c2da8a4967ecac4439bae3d"},
-    {file = "numpy-2.0.0-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:9a1712c015831da583b21c5bfe15e8684137097969c6d22e8316ba66b5baabe4"},
-    {file = "numpy-2.0.0-cp39-cp39-musllinux_1_2_aarch64.whl", hash = "sha256:9c27f0946a3536403efb0e1c28def1ae6730a72cd0d5878db38824855e3afc44"},
-    {file = "numpy-2.0.0-cp39-cp39-win32.whl", hash = "sha256:63b92c512d9dbcc37f9d81b123dec99fdb318ba38c8059afc78086fe73820275"},
-    {file = "numpy-2.0.0-cp39-cp39-win_amd64.whl", hash = "sha256:3f6bed7f840d44c08ebdb73b1825282b801799e325bcbdfa6bc5c370e5aecc65"},
-    {file = "numpy-2.0.0-pp39-pypy39_pp73-macosx_10_9_x86_64.whl", hash = "sha256:9416a5c2e92ace094e9f0082c5fd473502c91651fb896bc17690d6fc475128d6"},
-    {file = "numpy-2.0.0-pp39-pypy39_pp73-macosx_14_0_x86_64.whl", hash = "sha256:17067d097ed036636fa79f6a869ac26df7db1ba22039d962422506640314933a"},
-    {file = "numpy-2.0.0-pp39-pypy39_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:38ecb5b0582cd125f67a629072fed6f83562d9dd04d7e03256c9829bdec027ad"},
-    {file = "numpy-2.0.0-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:cef04d068f5fb0518a77857953193b6bb94809a806bd0a14983a8f12ada060c9"},
-    {file = "numpy-2.0.0.tar.gz", hash = "sha256:cf5d1c9e6837f8af9f92b6bd3e86d513cdc11f60fd62185cc49ec7d1aba34864"},
+    {file = "numpy-1.26.4-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:9ff0f4f29c51e2803569d7a51c2304de5554655a60c5d776e35b4a41413830d0"},
+    {file = "numpy-1.26.4-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:2e4ee3380d6de9c9ec04745830fd9e2eccb3e6cf790d39d7b98ffd19b0dd754a"},
+    {file = "numpy-1.26.4-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:d209d8969599b27ad20994c8e41936ee0964e6da07478d6c35016bc386b66ad4"},
+    {file = "numpy-1.26.4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ffa75af20b44f8dba823498024771d5ac50620e6915abac414251bd971b4529f"},
+    {file = "numpy-1.26.4-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:62b8e4b1e28009ef2846b4c7852046736bab361f7aeadeb6a5b89ebec3c7055a"},
+    {file = "numpy-1.26.4-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:a4abb4f9001ad2858e7ac189089c42178fcce737e4169dc61321660f1a96c7d2"},
+    {file = "numpy-1.26.4-cp310-cp310-win32.whl", hash = "sha256:bfe25acf8b437eb2a8b2d49d443800a5f18508cd811fea3181723922a8a82b07"},
+    {file = "numpy-1.26.4-cp310-cp310-win_amd64.whl", hash = "sha256:b97fe8060236edf3662adfc2c633f56a08ae30560c56310562cb4f95500022d5"},
+    {file = "numpy-1.26.4-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:4c66707fabe114439db9068ee468c26bbdf909cac0fb58686a42a24de1760c71"},
+    {file = "numpy-1.26.4-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:edd8b5fe47dab091176d21bb6de568acdd906d1887a4584a15a9a96a1dca06ef"},
+    {file = "numpy-1.26.4-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:7ab55401287bfec946ced39700c053796e7cc0e3acbef09993a9ad2adba6ca6e"},
+    {file = "numpy-1.26.4-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:666dbfb6ec68962c033a450943ded891bed2d54e6755e35e5835d63f4f6931d5"},
+    {file = "numpy-1.26.4-cp311-cp311-musllinux_1_1_aarch64.whl", hash = "sha256:96ff0b2ad353d8f990b63294c8986f1ec3cb19d749234014f4e7eb0112ceba5a"},
+    {file = "numpy-1.26.4-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:60dedbb91afcbfdc9bc0b1f3f402804070deed7392c23eb7a7f07fa857868e8a"},
+    {file = "numpy-1.26.4-cp311-cp311-win32.whl", hash = "sha256:1af303d6b2210eb850fcf03064d364652b7120803a0b872f5211f5234b399f20"},
+    {file = "numpy-1.26.4-cp311-cp311-win_amd64.whl", hash = "sha256:cd25bcecc4974d09257ffcd1f098ee778f7834c3ad767fe5db785be9a4aa9cb2"},
+    {file = "numpy-1.26.4-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:b3ce300f3644fb06443ee2222c2201dd3a89ea6040541412b8fa189341847218"},
+    {file = "numpy-1.26.4-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:03a8c78d01d9781b28a6989f6fa1bb2c4f2d51201cf99d3dd875df6fbd96b23b"},
+    {file = "numpy-1.26.4-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:9fad7dcb1aac3c7f0584a5a8133e3a43eeb2fe127f47e3632d43d677c66c102b"},
+    {file = "numpy-1.26.4-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:675d61ffbfa78604709862923189bad94014bef562cc35cf61d3a07bba02a7ed"},
+    {file = "numpy-1.26.4-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:ab47dbe5cc8210f55aa58e4805fe224dac469cde56b9f731a4c098b91917159a"},
+    {file = "numpy-1.26.4-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:1dda2e7b4ec9dd512f84935c5f126c8bd8b9f2fc001e9f54af255e8c5f16b0e0"},
+    {file = "numpy-1.26.4-cp312-cp312-win32.whl", hash = "sha256:50193e430acfc1346175fcbdaa28ffec49947a06918b7b92130744e81e640110"},
+    {file = "numpy-1.26.4-cp312-cp312-win_amd64.whl", hash = "sha256:08beddf13648eb95f8d867350f6a018a4be2e5ad54c8d8caed89ebca558b2818"},
+    {file = "numpy-1.26.4-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:7349ab0fa0c429c82442a27a9673fc802ffdb7c7775fad780226cb234965e53c"},
+    {file = "numpy-1.26.4-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:52b8b60467cd7dd1e9ed082188b4e6bb35aa5cdd01777621a1658910745b90be"},
+    {file = "numpy-1.26.4-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:d5241e0a80d808d70546c697135da2c613f30e28251ff8307eb72ba696945764"},
+    {file = "numpy-1.26.4-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:f870204a840a60da0b12273ef34f7051e98c3b5961b61b0c2c1be6dfd64fbcd3"},
+    {file = "numpy-1.26.4-cp39-cp39-musllinux_1_1_aarch64.whl", hash = "sha256:679b0076f67ecc0138fd2ede3a8fd196dddc2ad3254069bcb9faf9a79b1cebcd"},
+    {file = "numpy-1.26.4-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:47711010ad8555514b434df65f7d7b076bb8261df1ca9bb78f53d3b2db02e95c"},
+    {file = "numpy-1.26.4-cp39-cp39-win32.whl", hash = "sha256:a354325ee03388678242a4d7ebcd08b5c727033fcff3b2f536aea978e15ee9e6"},
+    {file = "numpy-1.26.4-cp39-cp39-win_amd64.whl", hash = "sha256:3373d5d70a5fe74a2c1bb6d2cfd9609ecf686d47a2d7b1d37a8f3b6bf6003aea"},
+    {file = "numpy-1.26.4-pp39-pypy39_pp73-macosx_10_9_x86_64.whl", hash = "sha256:afedb719a9dcfc7eaf2287b839d8198e06dcd4cb5d276a3df279231138e83d30"},
+    {file = "numpy-1.26.4-pp39-pypy39_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:95a7476c59002f2f6c590b9b7b998306fba6a5aa646b1e22ddfeaf8f78c3a29c"},
+    {file = "numpy-1.26.4-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:7e50d0a0cc3189f9cb0aeb3a6a6af18c16f59f004b866cd2be1c14b36134a4a0"},
+    {file = "numpy-1.26.4.tar.gz", hash = "sha256:2a02aba9ed12e4ac4eb3ea9421c420301a0c6460d9830d74a9df87efa4912010"},
 ]
 
 [[package]]
@@ -829,4 +820,4 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "9bdf5e33f063b2d94da2ae9d69ffb5fd16c3e4e6d3d5437617779a0cd2862236"
+content-hash = "a6863fa621b4a9d345b8ce61bdca443a40141db32535b4b8185164afb1694bc8"
diff --git a/pyproject.toml b/pyproject.toml
index c7a07cf..1a4c16c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "granite-suite"
-version = "0.2.0.1b3"  # TODO: To become 0.3.0
+version = "0.2.0.1b4"  # TODO: To become 0.3.0
 description = "granite is a collection of software to call, filter and work with genomic variants."
 authors = ["Michele Berselli <berselli.michele@gmail.com>", "Phil Grayson"]
 readme = "README.md"
@@ -22,7 +22,7 @@ packages = [
 python = "^3.9"
 bitarray = "^2.9.2"
 h5py = "^3.11.0"
-numpy = "^2.0.0"
+numpy = "^1.26.4"
 matplotlib = "^3.9.0"
 pysam = "^0.22.1"
 pytabix = "^0.1"