diff --git a/.github/workflows/pypi_deployment.yml b/.github/workflows/pypi_deployment.yml
index 86214ed..203b608 100644
--- a/.github/workflows/pypi_deployment.yml
+++ b/.github/workflows/pypi_deployment.yml
@@ -47,7 +47,7 @@ jobs:
       working-directory: .
       run: |
         cd scripts
-        ./pomdp_py_release.sh ${{ vars.RELEASE_ATTEMPT_COUNT }}
+        ./pomdp_py_release.sh
 
     - name: Upload to Test PyPi
       uses: pypa/gh-action-pypi-publish@release/v1
@@ -98,7 +98,7 @@ jobs:
       working-directory: .
       run: |
         cd scripts
-        ./pomdp_py_release.sh ${{ vars.RELEASE_ATTEMPT_COUNT }}
+        ./pomdp_py_release.sh
 
     - name: Upload to PyPi
       uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 97764ef..709456a 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,12 @@ Changelog
 
 Best viewed on `the website <https://h2r.github.io/pomdp-py/html/changelog.html>`_.
 
+Version 1.3.5.1 (03/30/2024)
+----------------------------
+* Hot fixes for :py:mod:`~pomdp_py.representations.distribution.particles.WeightedParticles`.
+* :py:mod:`~pomdp_py.framework.basics.Agent` can be created with a name.
+* Bug fixes for release script and GHA workflow.
+
 Version 1.3.5 (03/12/2024)
 --------------------------
 * Refactored :code:`_search` in :py:mod:`~pomdp_py.algorithms.po_uct.POUCT` to be more modular
diff --git a/pomdp_py/representations/distribution/particles.pyx b/pomdp_py/representations/distribution/particles.pyx
index 323208f..e598885 100644
--- a/pomdp_py/representations/distribution/particles.pyx
+++ b/pomdp_py/representations/distribution/particles.pyx
@@ -13,7 +13,7 @@ cdef class WeightedParticles(GenerativeDistribution):
 
     Args:
        particles (list): List of (value, weight) tuples. The weight represents
-           the likelihood that the value is drawn from the underlying distribution.
+           the likelihood that the value is drawn from the underlying distribution. Note that the weights may not be normalized. To normalize, call condense().
        approx_method (str): 'nearest' if when querying the probability
             of a value, and there is no matching particle for it, return
             the probability of the value closest to it. Assuming values
diff --git a/pyproject.toml b/pyproject.toml
index ff42c20..2a27e90 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pomdp-py"
-version = "1.3.5"
+version = "1.3.5.1"
 description = "Python POMDP Library."
 authors = [{name = "Kaiyu Zheng", email = "kzheng10@cs.brown.edu"}]
 license = {file = "LICENSE"}
diff --git a/scripts/pomdp_py_release.sh b/scripts/pomdp_py_release.sh
index d9cd79b..07db750 100755
--- a/scripts/pomdp_py_release.sh
+++ b/scripts/pomdp_py_release.sh
@@ -70,6 +70,21 @@ extract_package_version() {
     echo "$version"
 }
 
+get_base_version() {
+    version_string="$1"
+    echo "${version_string%-*}"
+}
+
+get_post_version() {
+    version_string="$1"
+    if [[ "$version_string" == *-* ]]; then  # Check if hyphen exists
+	echo "${version_string##*-}"
+    else
+	echo ""  # Output an empty string if no hyphen found
+    fi
+}
+
+
 user_pwd=$PWD
 
 # Write the MANIFEST.in file
@@ -79,12 +94,17 @@ cd $pomdp_py_path
 find_pxd_files_and_write_manifest ./ MANIFEST.in
 
 # Check if pomdp-py is on the right branch
-version=$(extract_package_version "$pomdp_py_path/pyproject.toml")
-attempt_count=""
-if [ $# -gt 0 ]; then
-    attempt_count="-$1"
+package_version=$(extract_package_version "$pomdp_py_path/pyproject.toml")
+base_version=$(get_base_version $package_version)
+post_version=$(get_post_version $package_version)
+
+if [[ -n "$post_version" ]]; then  # Check if $post_version is not empty
+    version="${base_version}.post${post_version}"
+else
+    version="$base_version"
 fi
-echo $version
+
+echo "RELEASE VERSION: $version"
 if ! is_git_repo_on_branch $pomdp_py_path dev-$version; then
     if ! is_git_repo_on_branch $pomdp_py_path dev-latest; then
         echo "pomdp-py repo must be either on dev-latest or dev-$version, but not $current_branch. Abort"
@@ -114,14 +134,13 @@ command="auditwheel repair io/dist/${wheel_name} -w /io/wheelhouse/"
 docker run --user $(id -u):$(id -g) --mount type=bind,source=${pomdp_py_path},target=/io $manylinux_image bash -c "$command"
 rm $pomdp_py_path/dist/$wheel_name
 fixed_wheel_name="pomdp_py-${version}-${cpv}-${cpv}-manylinux_2_17_x86_64.$linux_dist.whl"
-fixed_wheel_name_with_attempt="pomdp_py-${version}${attempt_count}-${cpv}-${cpv}-manylinux_2_17_x86_64.$linux_dist.whl"
-mv "$pomdp_py_path/wheelhouse/$fixed_wheel_name" "$pomdp_py_path/dist/$fixed_wheel_name_with_attempt"
+mv "$pomdp_py_path/wheelhouse/$fixed_wheel_name" "$pomdp_py_path/dist/$fixed_wheel_name"
 rm -r $pomdp_py_path/wheelhouse
 
 # Verification (wheel)
 echo -e "------------ verification: wheel ---------"
 pip uninstall pomdp_py
-pip install --force-reinstall "$pomdp_py_path/dist/$fixed_wheel_name_with_attempt"
+pip install --force-reinstall "$pomdp_py_path/dist/$fixed_wheel_name"
 python $pomdp_py_path/tests/test_all.py
 
 # Verification (source)
diff --git a/tests/test_particles.py b/tests/test_particles.py
index bb0a5f8..c906d43 100644
--- a/tests/test_particles.py
+++ b/tests/test_particles.py
@@ -5,6 +5,7 @@
 
 
 def test_particles():
+    random.seed(100)
     random_dist = {}
     total_prob = 0
     for v in range(4):
@@ -36,6 +37,7 @@ def test_particles():
 
 
 def test_weighted_particles():
+    random.seed(100)
     random_dist = {}
     total_prob = 0
     for v in range(5):
@@ -45,6 +47,9 @@ def test_weighted_particles():
     particles = pomdp_py.WeightedParticles.from_histogram(random_dist)
     particles_frozen = pomdp_py.WeightedParticles(particles.particles, frozen=True)
 
+    assert particles.hist_valid
+    assert particles_frozen.hist_valid
+
     assert abs(sum(particles[v] for v, _ in particles) - 1.0) <= 1e-6
     assert abs(sum(particles_frozen[v] for v, _ in particles_frozen) - 1.0) <= 1e-6
 
@@ -52,6 +57,7 @@ def test_weighted_particles():
         assert abs(particles[v] - random_dist[v] / total_prob) <= 2e-3
         assert abs(particles_frozen[v] - random_dist[v] / total_prob) <= 2e-3
 
+    # Test sampling
     counts = {}
     total = int(1e6)
     for i in range(total):
@@ -66,6 +72,25 @@ def test_weighted_particles():
     assert particles_frozen.mpe() == pomdp_py.Histogram(random_dist).mpe()
     hash(particles_frozen)
 
+    # Manually add a particle - this changes the distribution
+    particles.add(("x1", 0.1))
+    assert not particles.hist_valid
+    particles.random()  # operation does not re-compute histogram
+    assert not particles.hist_valid
+    pr_x1 = particles["x1"]  # operation will re-compute histogram
+    assert particles.hist_valid
+
+    # However, weights won't sum up to 1 due to the additional particle
+    assert abs(sum(particles[v] for v, _ in particles) - 1.0) > 1e-6
+
+    # After condensing, weights sum up to 1
+    particles = particles.condense()
+    assert abs(sum(particles[v] for v, _ in particles) - 1.0) <= 1e-6
+
+    # Test frozen after condense
+    assert not particles.condense().frozen
+    assert particles_frozen.condense().frozen
+
 
 def run():
     test_particles()