diff --git a/CITATION.cff b/CITATION.cff
index caf5fad..550bb8c 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -9,6 +9,6 @@ date-released: 2020-01-15
 doi: 10.5281/zenodo.3276220
 license: MIT
 message: "Jika menggunakan perangkat lunak ini, mohon sitasi menggunakan metadata ini."
-repository-code: "https://github.com/taruma/hidrokit"
+repository-code: "https://github.com/hidrokit/hidrokit"
 title: "hidrokit: Analisis Hidrologi dengan Python"
-version: "0.3.5"
+version: "0.3.6"
diff --git a/hidrokit/__version__.py b/hidrokit/__version__.py
index f033401..27e660b 100644
--- a/hidrokit/__version__.py
+++ b/hidrokit/__version__.py
@@ -1,4 +1,4 @@
-VERSION = (0, 3, 5)
+VERSION = (0, 3, 6)
 DEV_STATUS = ""
 
 __version__ = '.'.join(map(str, VERSION)) + DEV_STATUS
diff --git a/hidrokit/prep/timeseries.py b/hidrokit/prep/timeseries.py
index fa2bb42..85e8720 100644
--- a/hidrokit/prep/timeseries.py
+++ b/hidrokit/prep/timeseries.py
@@ -34,7 +34,7 @@ def _timestep_single(array, index=0, timesteps=2, keep_first=True):
         x.append(array[start:end, index])
 
     if not keep_first:
-        x.pop(-1)
+        x.pop(0)
 
     return np.array(x).transpose()
 

bug: timeseries.timestep_table error saat menggunakan keep_first
### Sistem
* Versi hidrokit: 0.4.0
* Distribusi python:
```
::       python version: 3.7.7     
::        numpy version: 1.18.5    
::       pandas version: 1.0.5     
::   matplotlib version: 3.2.2     
::     hydroerr version: 1.24      
::     hidrokit version: 0.4.0     
::   tensorflow version: 2.1.0     
::        keras version: 2.2.4-tf
```
* Sistem operasi: Windows 10

### Ringkasan Permasalahan

Keluaran menggunakan `keep_first=False` tidak sesuai harapan

__jika menggunakan True__
![image](https://user-images.githubusercontent.com/1007910/87144619-3ec15600-c2d2-11ea-99d8-b8398540008f.png)

__jika menggunakan False__
![image](https://user-images.githubusercontent.com/1007910/87144713-66b0b980-c2d2-11ea-8c71-9aa4ad7c8c2b.png)

Seharusnya, nilai `ch_A_tmin1` bernilai `4.18994`

__tabel 8 baris pertama__
![image](https://user-images.githubusercontent.com/1007910/87144787-8811a580-c2d2-11ea-8644-d4cd640b9430.png)

diff --git a/tests/test_prep_timeseries.py b/tests/test_prep_timeseries.py
index 95efa7b..4a69894 100644
--- a/tests/test_prep_timeseries.py
+++ b/tests/test_prep_timeseries.py
@@ -83,9 +83,9 @@ def test__timestep_multi():
     # Argument: timesteps=4, keep_first=False
     array_result_3 = np.array(
         [
+            [40, 30, 20, 10, 43, 33, 23, 13, 45, 35, 25, 15],
             [50, 40, 30, 20, 53, 43, 33, 23, 55, 45, 35, 25],
-            [60, 50, 40, 30, 63, 53, 43, 33, 65, 55, 45, 35],
-            [70, 60, 50, 40, 73, 63, 53, 43, 76, 65, 55, 45]
+            [60, 50, 40, 30, 63, 53, 43, 33, 65, 55, 45, 35]
         ]
     )
 
@@ -152,9 +152,9 @@ def test_timestep_table():
                  'C_tmin1', 'C_tmin2', 'C_tmin3', 'C_tmin4'],
         data=np.array(
             [
+                [40, 30, 20, 10, 43, 33, 23, 13, 45, 35, 25, 15],
                 [50, 40, 30, 20, 53, 43, 33, 23, 55, 45, 35, 25],
-                [60, 50, 40, 30, 63, 53, 43, 33, 65, 55, 45, 35],
-                [70, 60, 50, 40, 73, 63, 53, 43, 76, 65, 55, 45]
+                [60, 50, 40, 30, 63, 53, 43, 33, 65, 55, 45, 35]
             ]
         )
     )

pip install -e .[excel]
parse_log_pytest
requirements.txt
pytest pytest-cov
apt-get update apt-get install -y gcc
3.6
requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs==22.2.0
certifi==2021.5.30
coverage==6.2
cycler==0.11.0
et-xmlfile==1.1.0
-e git+https://github.com/hidrokit/hidrokit.git@6f2cfd89a468405d1a6cd7e7ffe022dbc0c70951#egg=hidrokit
importlib-metadata==4.8.3
iniconfig==1.1.1
kiwisolver==1.3.1
matplotlib==3.3.4
numpy==1.19.5
openpyxl==3.1.3
packaging==21.3
pandas==1.1.5
Pillow==8.4.0
pluggy==1.0.0
py==1.11.0
pyparsing==3.1.4
pytest==7.0.1
pytest-cov==4.0.0
python-dateutil==2.9.0.post0
pytz==2025.2
six==1.17.0
tomli==1.2.3
typing_extensions==4.1.1
xlrd==2.0.1
xlwt==1.3.0
zipp==3.6.0

name: hidrokit
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - attrs==22.2.0
      - coverage==6.2
      - cycler==0.11.0
      - et-xmlfile==1.1.0
      - importlib-metadata==4.8.3
      - iniconfig==1.1.1
      - kiwisolver==1.3.1
      - matplotlib==3.3.4
      - numpy==1.19.5
      - openpyxl==3.1.3
      - packaging==21.3
      - pandas==1.1.5
      - pillow==8.4.0
      - pluggy==1.0.0
      - py==1.11.0
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytest-cov==4.0.0
      - python-dateutil==2.9.0.post0
      - pytz==2025.2
      - six==1.17.0
      - tomli==1.2.3
      - typing-extensions==4.1.1
      - xlrd==2.0.1
      - xlwt==1.3.0
      - zipp==3.6.0
prefix: /opt/conda/envs/hidrokit

tests/test_prep_timeseries.py::test__timestep_multi tests/test_prep_timeseries.py::test_timestep_table
tests/test_prep_timeseries.py::test__timestep_single
hidrokit/__version__.py CITATION.cff hidrokit/prep/timeseries.py
hidrokit/__version__.py CITATION.cff hidrokit/prep/timeseries.py