diff --git a/requirements.txt b/requirements.txt
index 191a11a..e64f528 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,13 +1,13 @@
 dmr-kaitai>=0.9
-bitarray>=2.4.0
-numpy>=1.21.4
+bitarray==2.6.0
+numpy==1.23.2
+# required for test tools and working with pcap/pcapng (eg. cli dmrlib-pcap-tool)
+scapy>=2.4.5
 # for testing
 pytest>=7.0.1
 pytest-cov>=3.0.0
-pytest-asyncio>=0.18.2
+pytest-asyncio==0.19.0
 # required only to run test_crc (comparing crc and bit-crc implementations)
 crc>=1.1.2
-# required for test tools working with pcap/pcapng
-scapy>=2.4.5
 # for repo contributors
 pre-commit
diff --git a/setup.py b/setup.py
index 717c333..feba5f9 100644
--- a/setup.py
+++ b/setup.py
@@ -43,11 +43,11 @@
         ],
     },
     keywords="dmr etsi ham mmdvm homebrew radio hytera motorola",
-    python_requires="~=3.8",
+    python_requires=">=3.8",
     install_requires=[
-        "dmr-kaitai>=0.9",
-        "bitarray>=2.4.0",
-        "numpy>=1.21.4",
+        "dmr-kaitai>=1.0",
+        "bitarray>=2.6.0",
+        "numpy>=1.23.2",
         "scapy>=2.4.5",
     ],
     classifiers=[