diff --git a/Changelog.md b/Changelog.md
index 34d9fcdd5..8d01df91e 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -24,6 +24,9 @@
 1. Prevent -0 with out stream operator
     * [Pull request 206](https://github.com/ignitionrobotics/ign-math/pull/206)
 
+1. Use <ostream> and <istream> narrower includes, not <iostream>
+    * [Pull request 287](https://github.com/ignitionrobotics/ign-math/pull/287)
+
 ## Ignition Math 6.x
 
 ### Ignition Math 6.x.x
diff --git a/include/ignition/math/Angle.hh b/include/ignition/math/Angle.hh
index 1a3a0e169..7ce7d79b3 100644
--- a/include/ignition/math/Angle.hh
+++ b/include/ignition/math/Angle.hh
@@ -17,7 +17,8 @@
 #ifndef IGNITION_MATH_ANGLE_HH_
 #define IGNITION_MATH_ANGLE_HH_
 
-#include <iostream>
+#include <istream>
+#include <ostream>
 #include <ignition/math/Helpers.hh>
 #include <ignition/math/config.hh>
 
diff --git a/include/ignition/math/AxisAlignedBox.hh b/include/ignition/math/AxisAlignedBox.hh
index d6ac5668e..81bc1c1a6 100644
--- a/include/ignition/math/AxisAlignedBox.hh
+++ b/include/ignition/math/AxisAlignedBox.hh
@@ -17,7 +17,7 @@
 #ifndef IGNITION_MATH_AXISALIGNEDBOX_HH_
 #define IGNITION_MATH_AXISALIGNEDBOX_HH_
 
-#include <iostream>
+#include <ostream>
 #include <tuple>
 #include <ignition/math/config.hh>
 #include <ignition/math/Helpers.hh>
diff --git a/include/ignition/math/Color.hh b/include/ignition/math/Color.hh
index a32474561..6d8131407 100644
--- a/include/ignition/math/Color.hh
+++ b/include/ignition/math/Color.hh
@@ -17,8 +17,9 @@
 #ifndef IGNITION_MATH_COLOR_HH_
 #define IGNITION_MATH_COLOR_HH_
 
-#include <iostream>
 #include <cctype>
+#include <istream>
+#include <ostream>
 
 #include <ignition/math/Helpers.hh>
 #include <ignition/math/Vector3.hh>
diff --git a/include/ignition/math/Helpers.hh b/include/ignition/math/Helpers.hh
index e0a4b23b8..525578685 100644
--- a/include/ignition/math/Helpers.hh
+++ b/include/ignition/math/Helpers.hh
@@ -22,7 +22,7 @@
 #include <cmath>
 #include <cstdint>
 #include <iomanip>
-#include <iostream>
+#include <ostream>
 #include <limits>
 #include <regex>
 #include <sstream>
diff --git a/include/ignition/math/OrientedBox.hh b/include/ignition/math/OrientedBox.hh
index 3fd53d1f7..aa333802a 100644
--- a/include/ignition/math/OrientedBox.hh
+++ b/include/ignition/math/OrientedBox.hh
@@ -17,7 +17,7 @@
 #ifndef IGNITION_MATH_ORIENTEDBOX_HH_
 #define IGNITION_MATH_ORIENTEDBOX_HH_
 
-#include <iostream>
+#include <ostream>
 #include <ignition/math/Helpers.hh>
 #include <ignition/math/MassMatrix3.hh>
 #include <ignition/math/Material.hh>
diff --git a/include/ignition/math/Temperature.hh b/include/ignition/math/Temperature.hh
index a7f3ff71c..38db369c9 100644
--- a/include/ignition/math/Temperature.hh
+++ b/include/ignition/math/Temperature.hh
@@ -17,8 +17,9 @@
 #ifndef IGNITION_MATH_TEMPERATURE_HH_
 #define IGNITION_MATH_TEMPERATURE_HH_
 
-#include <iostream>
+#include <istream>
 #include <memory>
+#include <ostream>
 
 #include <ignition/math/config.hh>
 #include "ignition/math/Helpers.hh"
diff --git a/include/ignition/math/Vector3.hh b/include/ignition/math/Vector3.hh
index be05d43ba..eafa60307 100644
--- a/include/ignition/math/Vector3.hh
+++ b/include/ignition/math/Vector3.hh
@@ -17,10 +17,10 @@
 #ifndef IGNITION_MATH_VECTOR3_HH_
 #define IGNITION_MATH_VECTOR3_HH_
 
-#include <iostream>
-#include <fstream>
-#include <cmath>
 #include <algorithm>
+#include <cmath>
+#include <istream>
+#include <ostream>
 
 #include <ignition/math/Helpers.hh>
 #include <ignition/math/config.hh>
diff --git a/include/ignition/math/graph/Edge.hh b/include/ignition/math/graph/Edge.hh
index db68db461..e9253655d 100644
--- a/include/ignition/math/graph/Edge.hh
+++ b/include/ignition/math/graph/Edge.hh
@@ -20,8 +20,8 @@
 // uint64_t
 #include <cstdint>
 #include <functional>
-#include <iostream>
 #include <map>
+#include <ostream>
 #include <set>
 
 #include <ignition/math/config.hh>
diff --git a/include/ignition/math/graph/Graph.hh b/include/ignition/math/graph/Graph.hh
index 02e402371..cae3170e1 100644
--- a/include/ignition/math/graph/Graph.hh
+++ b/include/ignition/math/graph/Graph.hh
@@ -18,8 +18,8 @@
 #define IGNITION_MATH_GRAPH_GRAPH_HH_
 
 #include <cassert>
-#include <iostream>
 #include <map>
+#include <ostream>
 #include <set>
 #include <string>
 #include <utility>
diff --git a/include/ignition/math/graph/Vertex.hh b/include/ignition/math/graph/Vertex.hh
index b65b73b6d..38aaf78bf 100644
--- a/include/ignition/math/graph/Vertex.hh
+++ b/include/ignition/math/graph/Vertex.hh
@@ -20,8 +20,8 @@
 // uint64_t
 #include <cstdint>
 #include <functional>
-#include <iostream>
 #include <map>
+#include <ostream>
 #include <string>
 #include <utility>
 
diff --git a/src/SphericalCoordinates.cc b/src/SphericalCoordinates.cc
index 9f22925b2..e43d6e725 100644
--- a/src/SphericalCoordinates.cc
+++ b/src/SphericalCoordinates.cc
@@ -14,6 +14,7 @@
  * limitations under the License.
  *
 */
+#include <iostream>
 #include <string>
 
 #include "ignition/math/Matrix3.hh"