diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 73e84fd..bb8f89c 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.8", "3.9", "3.13.0"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/README.md b/README.md
index d6ab510..50abf19 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,9 @@ docker run --rm -it -v $(pwd):/home/docker   gitrust/scpinfo example.scp
 
 docker run --rm -it -v $(pwd):/home/docker   gitrust/scpinfo --csv 5 example.scp
 
+# under Windows
+docker run --rm -it -v %cd%:/home/docker   gitrust/scpinfo example.scp
+
 ```
 
 On Windows OS use `%cd%` instead of `$(pwd)` for volume binding.
diff --git a/leadtable.py b/leadtable.py
new file mode 100644
index 0000000..518fb93
--- /dev/null
+++ b/leadtable.py
@@ -0,0 +1,187 @@
+
+lead_table="""0,0
+1,I
+2,II
+3,V1
+4,V2
+5,V3
+6,V4
+7,V5
+8,V6
+9,V7
+10,V2R
+11,V3R
+12,V4R
+13,V5R
+14,V6R
+15,V7R
+16,X
+17,Y
+18,Z
+19,CC5
+20,CM5
+21,LA
+22,RA
+23,LL
+24,fl
+25,fE
+26,fC
+27,fA
+28,fM
+29,fF
+30,fH
+31,dI
+32,dII
+33,dV1
+34,dV2
+35,dV3
+36,dV4
+37,dV5
+38,dV6
+39,dV7
+40,dV2R
+41,dV3R
+42,dV4R
+43,dV5R
+44,dV6R
+45,dV7R
+46,dX
+47,dY
+48,dZ
+49,dCC5
+50,dCM5
+51,dLA
+52,dRA
+53,dLL
+54,dfI
+55,dfE
+56,dfC
+57,dfA
+58,dfM
+59,dfF
+60,dfH
+61,III
+62,aVR
+63,aVL
+64,aVF
+65,aVRneg
+66,V8
+67,V9
+68,V8R
+69,V9R
+70,D
+71,A
+72,J
+73,Defib
+74,Extern
+75,A1
+76,A2
+77,A3
+78,A4
+79,dV8
+80,dV9
+81,dV8R
+82,dV9R
+83,dD
+84,dA
+85,dJ
+86,Chest
+87,V
+88,VR
+89,VL
+90,VF
+91,MCL
+92,MCL1
+93,MCL2
+94,MCL3
+95,MCL4
+96,MCL5
+97,MCL6
+98,CC
+99,CC1
+100,CC2
+101,CC3
+102,CC4
+103,CC6
+104,CC7
+105,CM
+106,CM1
+107,CM2
+108,CM3
+109,CM4
+110,CM6
+111,dIII
+112,daVR
+113,daVL
+114,daVF
+115,daVRneg
+116,dChest
+117,dV
+118,dVR
+119,dVL
+120,dVF
+121,CM7
+122,CH5
+123,CS5
+124,CB5
+125,CR5
+126,ML
+127,AB1
+128,AB2
+129,AB3
+130,AB4
+131,ES
+132,AS
+133,AI
+134,S
+135,dDefib
+136,dExtern
+137,dA1
+138,dA2
+139,dA3
+140,dA4
+141,dMCL1
+142,dMCL2
+143,dMCL3
+144,dMCL4
+145,dMCL5
+146,dMCL6
+147,RL
+148,CV5RL
+149,CV6LL
+150,CV6LU
+151,V10
+152,dMCL
+153,dCC
+154,dCC1
+155,dCC2
+156,dCC3
+157,dCC4
+158,dCC6
+159,dCC7
+160,dCM
+161,dCM1
+162,dCM2
+163,dCM3
+164,dCM4
+165,dCM6
+166,dCM7
+167,dCH5
+168,dCS5
+169,dCB5
+170,dCR5
+171,dML
+172,dAB1
+173,dAB2
+174,dAB3
+175,dAB4
+176,dES
+177,dAS
+178,dAI
+179,dS
+180,dRL
+181,dCV5RL
+182,dCV6LL
+183,dCV6LU
+184,dV10
+"""
\ No newline at end of file
diff --git a/scputil.py b/scputil.py
index e72e90e..8899f3d 100644
--- a/scputil.py
+++ b/scputil.py
@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import struct
+from leadtable import lead_table
 
 def b2s(bytes):
     if len(bytes) != 2:
@@ -29,7 +30,13 @@ def bdecode(bytes):
 
 def lead_dic():
     """Return lead dictionary from file"""
-    return file2dict('leadtable.csv')
+    data_dict = {}
+    lines = lead_table.split('\n')
+    for line in lines:
+        if line:
+            key, value = line.split(',')
+            data_dict[int(key)] = value
+    return data_dict
 
 
 def file2dict(file):