diff --git a/Project.toml b/Project.toml
index e908f8c..f02bf76 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "PPTX"
 uuid = "14a86994-10a4-4a7d-b9ad-ef6f3b1fac6a"
 authors = ["Xander de Vries", "Matthijs Cox"]
-version = "0.9.0"
+version = "0.9.1"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
diff --git a/src/AbstractShape.jl b/src/AbstractShape.jl
index a689033..549e568 100644
--- a/src/AbstractShape.jl
+++ b/src/AbstractShape.jl
@@ -23,5 +23,8 @@ function _show_string(shape::AbstractShape, compact::Bool)
     return "$(typeof(shape))"
 end
 
-hlink_xml(hlink) = Dict("a:hlinkClick" => Dict("rId" => "rId$(rid(hlink))", "action" => "ppaction://hlinksldjump"))
+function hlink_xml(hlink, relationship_map::Dict)
+    rel_id = relationship_map[hlink]
+    Dict("a:hlinkClick" => Dict("r:id" => "rId$rel_id", "action" => "ppaction://hlinksldjump"))
+end
 has_hyperlink(s::AbstractShape) = hasfield(typeof(s), :hlink) && !isnothing(s.hlink)
\ No newline at end of file
diff --git a/src/Picture.jl b/src/Picture.jl
index 9a1e296..edd0263 100644
--- a/src/Picture.jl
+++ b/src/Picture.jl
@@ -99,13 +99,14 @@ function _show_string(p::Picture, compact::Bool)
     return show_string
 end
 
-function make_xml(shape::Picture, id::Int)
+function make_xml(shape::Picture, id::Int, relationship_map::Dict)
     cNvPr = Dict("p:cNvPr" => [Dict("id" => "$id"), Dict("name" => "Picture")])
     cNvPicPr = Dict("p:cNvPicPr" => Dict("a:picLocks" => Dict("noChangeAspect" => "1")))
     nvPr = Dict("p:nvPr" => missing)
     nvPicPr = Dict("p:nvPicPr" => [cNvPr, cNvPicPr, nvPr])
 
-    blip = Dict("a:blip" => Dict("r:embed" => "rId$(rid(shape))"))
+    rel_id = relationship_map[shape]
+    blip = Dict("a:blip" => Dict("r:embed" => "rId$rel_id"))
     stretch = Dict("a:stretch" => Dict("a:fillRect" => missing))
     blipFill = Dict("p:blipFill" => [blip, stretch])
 
@@ -137,10 +138,10 @@ function filename(p::Picture)
     return "$(source_filename)_$(p._uuid)$extension"
 end
 
-function relationship_xml(p::Picture)
+function relationship_xml(p::Picture, r_id::Integer)
     return Dict(
         "Relationship" => [
-            Dict("Id" => "rId$(rid(p))"),
+            Dict("Id" => "rId$r_id"),
             Dict("Type" => type_schema(p)),
             Dict("Target" => "../media/$(filename(p))"),
         ],
diff --git a/src/Slide.jl b/src/Slide.jl
index 28b6be1..28f2f7f 100644
--- a/src/Slide.jl
+++ b/src/Slide.jl
@@ -91,14 +91,14 @@ function Base.push!(slide::Slide, shape::AbstractShape)
     end
 end
 
-function make_slide(s::Slide)::AbstractDict
+function make_slide(s::Slide, relationship_map::Dict = slide_relationship_map(s))::AbstractDict
     xml_slide = OrderedDict("p:sld" => main_attributes())
 
     spTree = init_sptree()
     initial_max_id = 1
     for (index, shape) in enumerate(shapes(s))
         id = index + initial_max_id
-        push!(spTree["p:spTree"], make_xml(shape, id))
+        push!(spTree["p:spTree"], make_xml(shape, id, relationship_map))
     end
 
     push!(xml_slide["p:sld"], OrderedDict("p:cSld" => [spTree]))
@@ -148,17 +148,32 @@ function type_schema(s::Slide)
     return "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"
 end
 
-function relationship_xml(s::Slide)
+function relationship_xml(s::Slide, r_id::Integer)
     return Dict(
         "Relationship" => [
-            Dict("Id" => "rId$(rid(s))"),
+            Dict("Id" => "rId$r_id"),
             Dict("Type" => type_schema(s)),
             Dict("Target" => slide_fname(s)),
         ],
     )
 end
 
-function make_slide_relationships(s::Slide)::AbstractDict
+function slide_relationship_map(s::Slide)
+    d = Dict{Union{Slide, AbstractShape}, Int}()
+    r_id = 1 # first rid is reserved by slideLayout
+    for shape in shapes(s)
+        if has_rid(shape) && !haskey(d, shape)
+            r_id += 1
+            d[shape] = r_id
+        elseif has_hyperlink(shape) && !haskey(d, shape.hlink)
+            r_id += 1
+            d[shape.hlink] = r_id
+        end
+    end
+    return d
+end
+
+function make_slide_relationships(s::Slide, relationship_map::Dict = slide_relationship_map(s))::AbstractDict
     xml_slide_rels = OrderedDict("Relationships" => Dict[])
     push!(
         xml_slide_rels["Relationships"],
@@ -176,12 +191,20 @@ function make_slide_relationships(s::Slide)::AbstractDict
             ),
         ),
     )
+    used_r_ids = [1]
     for shape in shapes(s)
+        r_id = 1
         if has_rid(shape)
-            push!(xml_slide_rels["Relationships"], relationship_xml(shape))
+            r_id = relationship_map[shape]
+            r_shape = shape
         end
         if has_hyperlink(shape)
-            push!(xml_slide_rels["Relationships"], relationship_xml(shape.hlink))
+            r_id = relationship_map[shape.hlink]
+            r_shape = shape.hlink
+        end
+        if r_id ∉ used_r_ids
+            push!(xml_slide_rels["Relationships"], relationship_xml(r_shape, r_id))
+            push!(used_r_ids, r_id)
         end
     end
     return xml_slide_rels
diff --git a/src/Tables.jl b/src/Tables.jl
index 9997f14..e879a80 100644
--- a/src/Tables.jl
+++ b/src/Tables.jl
@@ -97,7 +97,7 @@ function _show_string(t::Table, compact::Bool)
     return show_string
 end
 
-function make_xml(t::Table, id::Integer)
+function make_xml(t::Table, id::Integer, relationship_map::Dict = Dict())
     nvGraphicFramePr = make_nvGraphicFramePr(t, id)
     xfrm = make_xfrm(t)
     tbl = make_xml_table(t)
diff --git a/src/TextBox.jl b/src/TextBox.jl
index 8f41ad9..1c8e0bf 100644
--- a/src/TextBox.jl
+++ b/src/TextBox.jl
@@ -191,10 +191,10 @@ function text_style_xml(t::TextStyle)
     return style
 end
 
-function make_xml(t::TextBox, id::Int=1)
+function make_xml(t::TextBox, id::Integer, relationship_map::Dict)
     cNvPr = Dict("p:cNvPr" => Dict[Dict("id" => "$id"), Dict("name" => "TextBox")])
     if has_hyperlink(t)
-        push!(cNvPr["p:cNvPr"], hlink_xml(t.hlink))
+        push!(cNvPr["p:cNvPr"], hlink_xml(t.hlink, relationship_map))
     end
 
     cNvSpPr = Dict("p:cNvSpPr" => Dict("txBox" => "1"))
diff --git a/src/write.jl b/src/write.jl
index 0feefb0..f1e88a9 100644
--- a/src/write.jl
+++ b/src/write.jl
@@ -73,7 +73,7 @@ function update_table_style!(w::ZipWriter, template::ZipBufferReader)
     nothing
 end
 
-function add_contenttypes!(w::ZipWriter, template::ZipBufferReader)
+function add_contenttypes!(w::ZipWriter, template::ZipBufferReader, pres::Presentation)
     path = "[Content_Types].xml"
     doc = EzXML.parsexml(zip_readentry(template, path))
     r = root(doc)
@@ -93,6 +93,12 @@ function add_contenttypes!(w::ZipWriter, template::ZipBufferReader)
         isnothing(findfirst(x -> (x.name == "Default" && x["Extension"] == ext), elements(r))) || continue
         addelement!(r, "Default Extension=\"$ext\" ContentType=\"$ct\"")
     end
+    for slide in pres.slides
+        slide_path = "/ppt/slides/slide$(slide.slide_nr).xml"
+        isnothing(findfirst(x -> (x.name == "Override" && x["PartName"] == slide_path), elements(r))) || continue
+        slide_ct = "application/vnd.openxmlformats-officedocument.presentationml.slide+xml"
+        addelement!(r, "Override PartName=\"$slide_path\" ContentType=\"$slide_ct\"")
+    end
     zip_newfile(w, path; compress=true)
     prettyprint(w, doc)
     zip_commitfile(w)
@@ -178,7 +184,7 @@ function Base.write(
             write_slides!(w, p, template_reader)
             write_shapes!(w, p)
             update_table_style!(w, template_reader)
-            add_contenttypes!(w, template_reader)
+            add_contenttypes!(w, template_reader, p)
             # copy over any files from the template
             # but don't overwrite any files in w
             for i in zip_nentries(template_reader):-1:1
diff --git a/test/testHyperlinks.jl b/test/testHyperlinks.jl
index 35f09da..12636e2 100644
--- a/test/testHyperlinks.jl
+++ b/test/testHyperlinks.jl
@@ -3,8 +3,10 @@
     pres = Presentation()
     s2 = Slide()
     s3 = Slide()
+    s4 = Slide()
 
     box = TextBox(content = "Hyperlinked text", hlink = s3)
+    push!(s2, box)
 
     @testset "has hyperlink" begin
         @test PPTX.has_hyperlink(box)
@@ -13,32 +15,31 @@
     end
 
     @testset "hyperlink xml" begin
-        xml = PPTX.hlink_xml(box.hlink)
-        @test xml["a:hlinkClick"]["rId"] == "rId$(PPTX.rid(s3))"
+        relationship_map = PPTX.slide_relationship_map(s2)
+        @test relationship_map[box.hlink] == 2
+        xml = PPTX.hlink_xml(box.hlink, relationship_map)
+        @test xml["a:hlinkClick"]["r:id"] == "rId2"
     end
 
-    push!(s2, box)
-    push!(pres, s2)
-    push!(pres, s3)
+    # push the same link once more
+    box2 = TextBox(content = "Hyperlinked text", hlink = s3)
+    push!(s2, box2)
 
-    @testset "hyperlink xml after rid update" begin
-        # After updating the rId of s2 the hyperlink xml should also be updated
-        xml = PPTX.hlink_xml(box.hlink)
-        @test xml["a:hlinkClick"]["rId"] == "rId$(PPTX.rid(s3))"
+    @testset "duplicate hyperlink relations" begin
+        relationship_map = PPTX.slide_relationship_map(s2)
+        @test length(relationship_map) == 1
+        @test relationship_map[box2.hlink] == 2
     end
 
-    # I malificently swap slides which should not affect hyperlinking
-    pres.slides[2] = s3
-    pres.slides[3] = s2
-
-    @testset "update slide nrs" begin
-        PPTX.update_slide_nrs!(pres)
-        @test pres.slides[2].slide_nr == 2
-        @test pres.slides[3].slide_nr == 3
-        xml_rels = PPTX.relationship_xml(box.hlink)
-        # Chech that rId is still the same
-        @test xml_rels["Relationship"][1]["Id"] == "rId$(PPTX.rid(s3))"
-        @test xml_rels["Relationship"][3]["Target"] == "slide$(PPTX.slide_nr(s3)).xml"
+    box3 = TextBox(content = "Hyperlinked text", hlink = s4)
+    push!(s2, box3)
+
+    @testset "multiple hyperlink relations" begin
+        relationship_map = PPTX.slide_relationship_map(s2)
+        @test length(relationship_map) == 2
+        @test relationship_map[box.hlink] == 2
+        @test relationship_map[box2.hlink] == 2
+        @test relationship_map[box3.hlink] == 3
     end
 
 end
\ No newline at end of file