diff --git a/pdm.lock b/pdm.lock
index e08dea31..bf4644a0 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "clipboard", "dev", "download", "express", "gel"]
 strategy = ["cross_platform"]
 lock_version = "4.4"
-content_hash = "sha256:98cdac0c16fd73fde82c5bddf3cb4a7ab179f5454fd99171d0734b8e5c6a17cb"
+content_hash = "sha256:c6c81b131789bf4e8d6753518cb8ac7eda082911c50737e18bd9bea9ec57c592"
 
 [[package]]
 name = "appdirs"
diff --git a/pyproject.toml b/pyproject.toml
index c297a77e..e4bef218 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,12 @@ authors = [
     {name = "BjornFJohansson", email = "bjornjobb@gmail.com"},
     {name = "Manuel Lera Ramirez", email = "manuel.ramirez@ucl.ac.uk"}]
 requires-python = ">=3.8"
-dependencies = ["appdirs >= 1.4.4",
-                "biopython >= 1.80",
-                "networkx >= 2.8.8",
-                "pydivsufsort >=0.0.12",
-                "prettytable >=3.5.0",
-                "pyfiglet >= 0.8.post1" ]
+dependencies = ["appdirs",
+                "biopython",
+                "networkx",
+                "pydivsufsort",
+                "prettytable",
+                "pyfiglet" ]
 readme = "README.md"
 license = {text = "MIT"}
 classifiers=["Development Status :: 4 - Beta",
@@ -33,18 +33,18 @@ source = "scm"
 write_to = "pydna/_version.py"
 write_template = "__version__ = '{}'"
 [project.optional-dependencies]
-clipboard = ["pyperclip >=1.8.2"]
-gel = ["scipy >= 1.9.3", "matplotlib >=3.4.3", "pillow >=8.4.0"]
-download = ["pyparsing >=2.4.7", "requests >=2.26.0"]
-express = ["cai2 >=1.0.5"]
+clipboard = ["pyperclip"]
+gel = ["scipy", "matplotlib", "pillow"]
+download = ["pyparsing", "requests"]
+express = ["cai2"]
 [tool.pdm.dev-dependencies]
-dev = ["pytest >=7.2.0",
-       "pytest-cov >=4.0.0",
-       "pytest-doctestplus >=0.12.1",
-       "pytest-profiling >=1.7.0",
-       "coverage >=7.1.0",
-       "nbval >=0.9.6",
-       "requests-mock >=1.10.0"]
+dev = ["pytest",
+       "pytest-cov",
+       "pytest-doctestplus",
+       "pytest-profiling",
+       "coverage",
+       "nbval",
+       "requests-mock"]
 [project.urls]
 homepage = "https://github.com/BjornFJohansson/pydna#-pydna"
 documentation = "https://pydna.readthedocs.io/?badge=latest"