diff --git a/environment.yml b/environment.yml
index 2a3c1a7..df77653 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,7 +2,7 @@ name: oemof-heat-pump-tutorial-env
 channels:
 - conda-forge
 dependencies:
-- python==3.10
+- python==3.11
 - pip
 - pip:
   - oemof.solph
diff --git a/heat-pump-partload-tespy.ipynb b/heat-pump-partload-tespy.ipynb
index d04f328..1f7e177 100644
--- a/heat-pump-partload-tespy.ipynb
+++ b/heat-pump-partload-tespy.ipynb
@@ -46,7 +46,7 @@
     "from tespy.networks import Network\n",
     "\n",
     "wf = \"R290\"\n",
-    "nwk = Network(fluids=[wf, \"air\", \"Water\"], p_unit=\"bar\", T_unit=\"C\", iterinfo=False)\n",
+    "nwk = Network(p_unit=\"bar\", T_unit=\"C\", iterinfo=False)\n",
     "\n",
     "cp = Compressor(\"compressor\")\n",
     "ev = HeatExchanger(\"evaporator\")\n",
@@ -102,10 +102,10 @@
     "\n",
     "# connections\n",
     "T_ambient_design = 7\n",
-    "c2.set_attr(fluid={wf: 1, \"Water\": 0, \"air\": 0}, x=1.0)\n",
-    "c11.set_attr(fluid={wf: 0, \"Water\": 0, \"air\": 1}, p=1.0, T=T_ambient_design)\n",
+    "c2.set_attr(fluid={wf: 1}, x=1.0)\n",
+    "c11.set_attr(fluid={\"air\": 1}, p=1.0, T=T_ambient_design)\n",
     "c12.set_attr(T=Ref(c11, 1, -2))\n",
-    "c21.set_attr(fluid={wf: 0, \"Water\": 1, \"air\": 0}, p=3.0, T=30)\n",
+    "c21.set_attr(fluid={\"Water\": 1}, p=3.0, T=30)\n",
     "c22.set_attr(T=35)\n",
     "\n",
     "# components\n",
@@ -238,7 +238,7 @@
     "            nwk.save(\"tmp\")\n",
     "            init_path = \"tmp\"\n",
     "        else:\n",
-    "            nwk.solve(\"offdesign\", design_path=\"design-state\")  \n",
+    "            nwk.solve(\"offdesign\", design_path=\"design-state\")\n",
     "\n",
     "        results[temperature].loc[heat, \"COP\"] = abs(cd.Q.val) / cp.P.val\n",
     "        results[temperature].loc[heat, \"compressor-power\"] = cp.P.val\n",
@@ -414,7 +414,7 @@
     "fig, ax = plt.subplots(1)\n",
     "\n",
     "for temp in temperature_range[::10]:\n",
-    "        \n",
+    "\n",
     "    x = -results[temp].index.values.astype(float)\n",
     "    y = results[temp][\"compressor-power\"].values.astype(float)\n",
     "    slope, offset = least_squares(x, y)\n",
diff --git a/requirements.txt b/requirements.txt
index 977d001..048b6ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-tespy>=0.6.2
+tespy>=0.7.0
 oemof.solph>=0.5
\ No newline at end of file
diff --git a/simple-heat-pump-tespy.ipynb b/simple-heat-pump-tespy.ipynb
index 335119e..3f4dd76 100644
--- a/simple-heat-pump-tespy.ipynb
+++ b/simple-heat-pump-tespy.ipynb
@@ -47,7 +47,7 @@
    "outputs": [],
    "source": [
     "wf = \"R290\"\n",
-    "nwk = Network(fluids=[wf], p_unit=\"bar\", T_unit=\"C\", iterinfo=False)"
+    "nwk = Network(p_unit=\"bar\", T_unit=\"C\", iterinfo=False)"
    ]
   },
   {
diff --git a/workshop/model/tespy-partload-performance.ipynb b/workshop/model/tespy-partload-performance.ipynb
index ad3740d..a989364 100644
--- a/workshop/model/tespy-partload-performance.ipynb
+++ b/workshop/model/tespy-partload-performance.ipynb
@@ -80,7 +80,7 @@
     "from tespy.networks import Network\n",
     "\n",
     "wf = \"R290\"\n",
-    "nwk = Network(fluids=[wf, \"air\", \"Water\"], p_unit=\"bar\", T_unit=\"C\", iterinfo=False)\n",
+    "nwk = Network(p_unit=\"bar\", T_unit=\"C\", iterinfo=False)\n",
     "\n",
     "cp = Compressor(\"compressor\")\n",
     "ev = HeatExchanger(\"evaporator\")\n",
@@ -144,10 +144,10 @@
     "\n",
     "# connections\n",
     "T_ambient_design = 7\n",
-    "c2.set_attr(fluid={wf: 1, \"Water\": 0, \"air\": 0}, x=1.0)\n",
-    "c11.set_attr(fluid={wf: 0, \"Water\": 0, \"air\": 1}, p=1.0, T=T_ambient_design)\n",
+    "c2.set_attr(fluid={wf: 1}, x=1.0)\n",
+    "c11.set_attr(fluid={\"air\": 1}, p=1.0, T=T_ambient_design)\n",
     "c12.set_attr(T=Ref(c11, 1, -2))\n",
-    "c21.set_attr(fluid={wf: 0, \"Water\": 1, \"air\": 0}, p=3.0, T=30)\n",
+    "c21.set_attr(fluid={\"Water\": 1}, p=3.0, T=30)\n",
     "c22.set_attr(T=35)\n",
     "\n",
     "# components\n",
@@ -695,7 +695,7 @@
     "            nwk.solve(\"offdesign\", design_path=\"design-state\", init_path=\"tmp\")\n",
     "            nwk.save(\"tmp\")\n",
     "        else:\n",
-    "            nwk.solve(\"offdesign\", design_path=\"design-state\")  \n",
+    "            nwk.solve(\"offdesign\", design_path=\"design-state\")\n",
     "\n",
     "        results[temperature].loc[heat, \"COP\"] = abs(cd.Q.val) / cp.P.val\n",
     "        results[temperature].loc[heat, \"compressor-power\"] = cp.P.val\n",
@@ -875,7 +875,7 @@
     "fig, ax = plt.subplots(1)\n",
     "\n",
     "for temp in temperature_range[::10]:\n",
-    "        \n",
+    "\n",
     "    x = -results[temp].index.values.astype(float)\n",
     "    y = results[temp][\"compressor-power\"].values.astype(float)\n",
     "    slope, offset = least_squares(x, y)\n",
@@ -955,7 +955,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.10.0"
   },
   "orig_nbformat": 4
  },
diff --git a/workshop/model/tespy-simple.ipynb b/workshop/model/tespy-simple.ipynb
index d1b2970..67778d5 100644
--- a/workshop/model/tespy-simple.ipynb
+++ b/workshop/model/tespy-simple.ipynb
@@ -97,7 +97,7 @@
    "outputs": [],
    "source": [
     "wf = \"R290\"\n",
-    "nwk = Network(fluids=[wf], p_unit=\"bar\", T_unit=\"C\", iterinfo=False)"
+    "nwk = Network(p_unit=\"bar\", T_unit=\"C\", iterinfo=False)"
    ]
   },
   {
@@ -308,7 +308,7 @@
     "    if i > 10:\n",
     "        print(\"no solution found\")\n",
     "        break\n",
-    "    \n",
+    "\n",
     "    i += 1\n",
     "\n",
     "efficiency = round(cp.eta_s.val, 3)"
@@ -491,7 +491,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.10.0"
   }
  },
  "nbformat": 4,