diff --git a/Applications/FileIO/CsvInterface.cpp b/Applications/FileIO/CsvInterface.cpp
index adb2ffe87511e309231b351d19b38b2d7479fe57..4330651f94b8959fb1d8ca2989a102a0375e5b99 100644
--- a/Applications/FileIO/CsvInterface.cpp
+++ b/Applications/FileIO/CsvInterface.cpp
@@ -14,9 +14,8 @@
 #include "CsvInterface.h"
 
 #include <algorithm>
-#include <iostream>
+#include <fstream>
 #include <numeric>
-#include <stdexcept>
 
 #include "GeoLib/Point.h"
 
diff --git a/Applications/FileIO/SWMM/SWMMInterface.cpp b/Applications/FileIO/SWMM/SWMMInterface.cpp
index 8826f009d2c7f5536e62ef27bc50550093959408..cf049b5a159813ab035ec635edbcb1362e43673d 100644
--- a/Applications/FileIO/SWMM/SWMMInterface.cpp
+++ b/Applications/FileIO/SWMM/SWMMInterface.cpp
@@ -9,7 +9,7 @@
 #include "SwmmInterface.h"
 
 #include <cctype>
-#include <iostream>
+#include <fstream>
 #include <utility>
 
 #include "BaseLib/FileTools.h"
diff --git a/BaseLib/LogogCustomCout.h b/BaseLib/LogogCustomCout.h
index 37c65a54270849a35d7a06effad53a0b124f49aa..750a4e2513d5f0bc7c8d9cf709fcf312289f8957 100644
--- a/BaseLib/LogogCustomCout.h
+++ b/BaseLib/LogogCustomCout.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#include <iostream>
+#include <ostream>
 
 #include <logog/include/logog.hpp>
 
diff --git a/MaterialLib/TwoPhaseModels/TwoPhaseFlowWithPPMaterialProperties.h b/MaterialLib/TwoPhaseModels/TwoPhaseFlowWithPPMaterialProperties.h
index 3f778b2cb9f719461a281a4711332836a5cf4117..a88b56bde923d9b09843af0b986af89c3ba3d7de 100644
--- a/MaterialLib/TwoPhaseModels/TwoPhaseFlowWithPPMaterialProperties.h
+++ b/MaterialLib/TwoPhaseModels/TwoPhaseFlowWithPPMaterialProperties.h
@@ -9,7 +9,6 @@
 
 #pragma once
 
-#include <iostream>
 #include <memory>
 #include <vector>
 
diff --git a/ProcessLib/TwoPhaseFlowWithPrho/TwoPhaseFlowWithPrhoMaterialProperties.h b/ProcessLib/TwoPhaseFlowWithPrho/TwoPhaseFlowWithPrhoMaterialProperties.h
index fd232b493a986ed0c04c368764530e840dc4a0b7..5566d3638674ad1c7dcea7a849bfaa20b82af9b9 100644
--- a/ProcessLib/TwoPhaseFlowWithPrho/TwoPhaseFlowWithPrhoMaterialProperties.h
+++ b/ProcessLib/TwoPhaseFlowWithPrho/TwoPhaseFlowWithPrhoMaterialProperties.h
@@ -9,7 +9,6 @@
 
 #pragma once
 
-#include <iostream>
 #include <memory>
 #include <vector>
 #include "MaterialLib/Fluid/FluidPropertyHeaders.h"